Category Archives: Gunsmithing

Posts that touch on gunsmithing topics such as improving function, finishes, changing parts, and anything else that alters a weapon

How to do Home Manganese Parkerizing

The Following is a Basic Do-it-yourself Manganese Parkerizing Formula

A couple of friends online, Elkaholic and Ding, got me interested in parkerizing years ago and gave me a home brew formula and process steps they use.  I have been tuning that formula for a few years and thought I would share it as I use it both for blades and firearms.  It works great as either the base for a top finish, such as Molyresin or as a finish all by itself.  You may be wondering “why not just buy a premade formula such as the great parkerizing solution from Brownell’s” – the short answer is because tinkering can be fun and more rewarding.  I like to experiment and try different things.   So, with that said, here is the recipe:

Ingredients

– 2 gallons of distilled water  (it gives more consistent results because impurities have been removed – sold at supermarkets and drug stores)
2 “biscuits” of clean plain 0000 steel wool (thinner steel wool dissolves faster hence the use of 0000 grade)
– 1 cup of Klean Strip brand Phosphoric Prep & Etch (or other phosphoric acid etching solution around 35-45% concentrate per the Prep & Etch MSDS sheet. Dilute the acid if higher. For example, if 100% pure then go 60 water:40 acid – you can always experiment with the ratio that works for you)
6 rounded tablespoons of manganese dioxide (available at pottery supply stores, Amazon or eBay)

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Do this outside – never in your house or shop (unless you have a great vent hood).  If you do it indoors, you will likely make stuff rust fast!

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As you can see, I use a camp stove.  For the first couple of years I just used a Coleman stove but that was always a balancing act with my 48″ long stainless pakerizing tank that I used for barreled actions.  I found the above great Camp Chef stove at Amazon and it is fantastic but any heat source will work. I like propane because its portable and not electric (to avoid any chance of electric shock) and there are tons of propane camp stoves on Amazon.

Also, be sure to use stainless steel for your tanks.  I watch for sales or buy stuff off eBay.  The big cooker above is from Walmart and the rectangular pan shown below is from Amazon and is normally the water pan for buffet lines.

For tongs to move stuff around, use solid stainless.  I tried the plastic ones and they can leave a plastic residue on blasted surfaces and mess up your finish.

Just like baking, if you want more of the solution, take the recipe and multiply it by two, four or however many multiples you want. Just be sure you have a place to store it when done.  I use 5 gallon jugs and label them.

Steps to Follow

  1. Add acid to water in a stainless pan/pot and heat to 190F – don’t boil and waste it.  I use a baking thermometer clipped to the side of the pan.
  2. Spray each wool biscuit with brake cleaner to remove oils and allow each time to dry
  3. As the solution warms shred the steel wool into the liquid and add the manganese dioxide
  4. Let the mix simmer and dissolve the steel wool before adding parts
  5. I always blast my parts before I parkerize them – I’ve heard guys tell about using a wire brush on a buffer or drill press as well but I’ve not tried that.  Blasting removes the oxides and exposes the bare steel.
  6. Make sure your parts are very, very clean and degreased — only handle with rubber gloves after they are cleaned or oils from your skin can mess things up
  7. You can suspend your parts in the liquid with stainless wire.  Leave them until the fizzing stops or about 30-40 minutes.  The time varies.
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  8. Rinse the parts with boiling water thoroughly to remove the acid.
  9. Spray parts with WD40 to get the water away from the steel
  10. Wipe down with oil or apply whatever secondary finish you want – don’t do both 🙂  If you are going to apply a finish on top of the parkerized surface, use acetone or brake cleaner to remove any oils and then follow their instructions.

At the bottom of the post are links to Amazon products including long parkerizing tanks.

Cleaning Up

When you are done, let your mixture cool and strain the liquid through a coffee filter into a plastic can for future use. I use a blue kerosene 5 gallon container because it is a different color from all my other 5 gallon containers plus I label it.  Point being, you do not want to get confused and pour this stuff in when you meant to use a fuel, etc.

The precipitate, the stuff on the bottom, should be scooped onto a shallow pan, allowed to dry and be disposed of as a hazardous waste.  For example, where ever your community collects old paints, batteries, etc.

Brownells Has Great Parkerizing Solutions and Kits

Brownells sells very well regarded ready-to-use formulations. I have no hesitation at all to recommend the below items to you – they are top notch.

  • Click here for their manganese parkerization supplies. Their formula meets Mil Spec STD171
  • Click here for their zinc parkerization supplies
  • If you have a lot small parts you want to park, they have a bench top kit ready to go that you can buy – click here
  • Click here for their complete parkerizing tank system. This is a complete system for gunsmiths or others who need to park everything from small parts and pistols up to firearms and swords.

In Summary

I hope this helps you out. I’ve used the above many times and the results are solid.

Updated 2/13/24 with new sources and fixed some grammar issues.


Note, I have to buy all of my parts – nothing here was paid for by sponsors, etc. I do make a small amount if you click on an ad and buy something but that is it. You’re getting my real opinion on stuff.

If you find this post useful, please share the link on Facebook, with your friends, etc. Your support is much appreciated and if you have any feedback, please email me at in**@ro*********.com. Please note that for links to other websites, I may be paid via an affiliate program such as Avantlink, Impact, Amazon and eBay.



Need a compact hand stop for a Picatinny rail? Check out the Arisaka HS-P

When I built our a pistol with recoil, I worry about my hand slipping off the handguard and going in front of the muzzle. I recently bought a Stribog 10mm and that was running through my mind – so I started digging for hand stops that could mount on a picatinny rail.

I should point out I don’t like angled fore grips (AFGs) or anything that incorporates that design aspect. I like the bottom of the handguard to be flat. I also like hand stops that are small from an aesthetics perspective plus I don’t want the ATF, or whomever, arguing that I actually have a vertical grip which is illegal on a pistol.

I ran across an ad for Arisaka Defense’s HS-P handstop. It mounts on rail though I couldn’t quite figure out how from the website photos. Because I’ve had good luck with Arisaka products in the past, I gambled and ordered one. Guess what? I really like it and figured a quick post might be of interest to others.

So the HS-P is CNC machined from 6061-T651 aluminum and MIL-A-8625 Type III hard coat anodized.
The secret sauce that makes this so cool is that grey aluminum recoil lug. There is a screw attached that you can’t see that raises or lowers it into whatever Picatinny rail slot you want locking it in place. Simple and slick!
The front has slots cut into it. I suppose that could help if you want to use it on a barrier.
On the bottom is the hole for the screw. Use a 7/64″ allen key to tighten (push the lug up) or loosen (lower the lug down). Torque is 15 in/lbs – please note that is inch/pounds and not foot/pounds.
In this photo, you can see the retracted recoil lug. I then just slid the HS-P onto the handguard’s rail to where I wanted it.
I slid the HS-P on and then used my closes allen set with a 7/64 key to raise the lug into position. I brought it up firm but not crazy tight – I didn’t have a long enough key for my torquing screw driver handy (meaning it is “temporary misplaced”) so I opted for ballpark tight. They don’t include a 7/74″ allen key by the way. It doesn’t bother me because I have a bunch. Also, often times the “free” keys that come with something aren’t very good – I’ve torn things up many times in the past trying to use marvel mystery metal included keys so I don’t do it any longer.
The HS-P is rock solid.

Summary

It you are looking for a solid small hand stop that mounts on a rail, the Arisaka HS-P is great. I have no reservations recommending it.

Yes, I actually bought this. I was not paid to write this.


Note, I have to buy all of my parts – nothing here was paid for by sponsors, etc. I do make a small amount if you click on an ad and buy something but that is it. You’re getting my real opinion on stuff.

If you find this post useful, please share the link on Facebook, with your friends, etc. Your support is much appreciated and if you have any feedback, please email me at in**@ro*********.com. Please note that for links to other websites, I may be paid via an affiliate program such as Avantlink, Impact, Amazon and eBay.


Timney Trigger Pack Failed in My Tavor X95 – I Switched to the Geissele Super Sabra

Back in August 2021, I bought a Tavor X95 and everybody told me to switch the stock trigger cartridge. I did some research and at that time people were recommending Timney or Geissele. My first choice was honestly Geissele because I really like their AR triggers but I couldn’t find them. Timney was the same way so I ordered both – I ordered the Timney on 8/17/21 direct from them and they shipped on 10/6/21. I also backordered a Geissele Super Sabra 05-267 with the thought that I could write a blog post at some point and compare them. The Timney arrived first and that’s what I installed and used up until yesterday. Let me explain.

I took my daughter’s fiancé, Kris, visiting from out of town to our local Berrien County Sportsman’s Club range for a few hours of shooting. The Timney trigger pack was in the Tavor and has been since I bought the Tavor. It has maybe 300-400 rounds through it – I’ve not shot it since I posted about taking it to the range last fall and the great time we had. At any rate, we shot a number of pistols and then it was rifle time – I told Kris that the Tavor is my favorite rifle right now and we start shooting.

I shot about 5 rounds to show the controls and make sure everything was good. I then handed it to Kris who then shot a few rounds and then things got weird. He pulled the trigger and nothing happened. I took the Tavor from him, and explained how to safely handle misfires and ejected the round. There was a barely noticeable dent on the primer. “Huh” I thought – must be a flaky hard primer. I loaded it again and tried – same thing. I took the round to the range’s misfire tube and dropped it down the pipe.

This is Kris wondering why it didn’t just fire.

I cycled the Tavor empty, it seemed okay, I then inserted a mag and made sure it was fully seated, handed the X95 to Kris who then charged it, we made sure the bolt was all the way home and he pulled the trigger. Nothing. Okay … something weird was happening. I took the X95 and ejected the round – same thing – a very light dent on the primer. At this point I was beginning to suspect something was wrong with the Tavor – we were shooting Winchester bulk M855 that normally I don’t have any problems with and absolutely never twice in a row.

I had Kris try again and this time I heard something. He would pull the trigger and nothing would happen but when he released trigger there was a delay followed by a click and then if he tried again it would fire. Okay …. something funky was going on inside the Tavor.

I removed all of the ammo and I could replicate it. Something was going on with either the rod that transfers the trigger pull back to the “trigger pack” or “sear mechanism assembly” – what IWI calls the trigger pack – or the trigger pack itself. It was time to pack the rifle up and we moved to an AR I brought that ran just fine.

Taking the X95 Apart

I have a love hate relationship with aftermarket parts. Most of the time when I take and replace a stock part with an aftermarket and something goes wrong, it’s the fault of the aftermarket part. To make a long story short, the problem at the range was caused by the Timney trigger pack.

On a Tavor, the trigger pack normally pulls out very easily once you pull out the two retaining pins. Not this time. It did NOT want to come out. I had to pull pretty forcefully to get it out and the culprit was a big silver dowel/axle pin located in the top front of the pack. Both it and a smaller one in the middle were way out towards the right side. Why? No idea. I tapped both the pins back in with a nylon head soft blow hammer in my Weaver gunsmith kit. I tried to get it to “fire” and it wouldn’t so I switched gears and installed the Geissele Super Sabra instead that was still new in the box.

Both of these pins were sticking out on this side. I already tapped them back in before I took this photo.

I lubricated the Super Sabra per their instructions and it dropped right in and worked. So, right now I have an inoperable Timney that I can’t get to do anything on the bench that I think I will try and have Timney do a warranty repair on – I’m kind of curious what they will do or not do. In the mean time, I will happily run the Super Sabra.

The Geissele Super Sabra on the left and the Timney Tavor trigger pack on the right. Note how the Super Sabra is using screws vs. pins.
Here’s the other side of the trigger packs.
I have always found Geissele’s engineering to be top notch. This trigger pack dropped right in and felt great. If I were to bet money, and I guess I already did since I bought it, this pack will last. The Super Sabra 05-267.

The Super Sabra feels really good – I am still using the stock Tavor trigger itself – the part you actually pull with your finger. Geissele sells a replacement trigger but I am not using it – just the replacement Super Sabra trigger pack.

For a bullpup trigger the Super Sabra is quite decent. There is a long pull but it breaks pretty nicely at 4 pounds 12 oz on average. To get that number, I did 10 test pulls with my Wheeler digital gauge. The lightest pull was 4 pounds 2oz and the heaviest was 5 pounds 1 oz. Very manageable and will be what I use going forward.

As I was writing this blog post, I had the Timney trigger pack in front of me. I tried repeatedly to actuate the hammer by pulling on the little lever that connects to the transfer rod in the rifle. Boy, it would not move – not one bit. I’d put a ball pin in the “U” and pull – it would not budge. I just tried again right now and heard a loud click just like we did at the range. I pulled on the lever again while controlling the hammer with my free hand and it “fired” – the hammer came up. In looking inside the cartridge i have no idea what has happened but don’t want to take it apart and void a warranty either. When I closed the hammer, it made a funny clunking abnormal sound and now doesn’t want to open/fire again. Weird. Something has gone wrong, that much I know.

I was able to eventually get it to open while I was writing the post. It made the same odd click sound that we heard at the range and after that it opened.
When I closed it, an abnormal clunking sound came from the pack and it will not open again.

Summary

Not sure what happened but the Timney trigger pack stopped working. I plan on contacting Timney to see if they will look at it under warranty and will report back how it goes – I emailed them on 2/12/2023. I’m now running the Geissele Super Sabra pack and will see how that holds up.

I’m hoping Timney will do a warranty repair so I can compare both units down the road as I had originally hoped. I’ll update the blog post with how that turns out. By the way, I’ve had a number of Timney triggers over the years and this is the first problem I’ve had with one.

3/28/2023 Update: Got a nice update email from Timney. They are revising the design of the disconnector and will start production in June. That’s pretty cool that they are learning and improving their design. They offered me a refund or to wait for the new model and I opted for a refund at this point and they processed it (I bought it direct from them in this case). So, I am happy with the result.

3/25/23 Update: Really not happy with Timney customer service – I sent them polite emails asking for a status or even if they have the trigger (I can see they do from the tracking #) but they don’t even reply. Last email I told them I don’t mind waiting but please give me an idea of the lead time – no reply. I literally have no idea of the turn around time – they never gave me an estimate.

2/17/23 Update: Timney customer service was really easy to work with. They asked me to send them the trigger pack and they would take care of it. So, I sent it via priority mail with insurance on 2/16. I’m curious if they will tell me what went wrong.


Note, I have to buy all of my parts – nothing here was paid for by sponsors, etc. I do make a small amount if you click on an ad and buy something but that is it. You’re getting my real opinion on stuff.

If you find this post useful, please share the link on Facebook, with your friends, etc. Your support is much appreciated and if you have any feedback, please email me at in**@ro*********.com. Please note that for links to other websites, I may be paid via an affiliate program such as Avantlink, Impact, Amazon and eBay.


Use a Wheeler Engineering Green Laser Bore Sight To Get Your Scope or Optic Range Ready

When you buy a scope/optic and mount it on your rifle or pistol, it may relatively be close to where the actual bullet will hit the target or it may be a mile off. This applies just as much to dot optics as well as scopes with magnification. First off, this is why you need to sight in any type of optic before you use it. Second, unless you want to waste a ton of ammo, this is why you want to bore sight an optic before you do the final adjustments.

“Bore Sighting” refers to looking down the bore, seeing the target and roughly dialing on the elevation and windage of the optic. This was never perfect but it at least got you on the paper at 25-50 yards you could then start dialing in the scope and backing up to whatever range you wanted to dial the scope in for. This method worked fine if you could actually remove the bolt and look down the scope, such as a bolt action rifle. It doesn’t work for semi-autos where you typically have a closed rear receiver and can’t look down the bore. It also doesn’t work for folks like me who can’t see the broad side of a bright red barn when trying to look down a bore.

The industry responded with all kinds of gizmos to help improve the process ranging from calibrated collimeters that let you roughly sight in by pointing at some target held up from the end of the barrel. That lasted for a few years until lasers started getting affordable and then models started popping up that either went in the muzzle with some form of collet to help center the shaft in the barrel or there were ones that approximated the shape of a given round and went in the chamber. The accuracy of either one greatly depended on the quality control of the manufacturer. In general, they worked and were really simple – put the laser in, turn it on and then dial in your scope to where the red dot was showing.

Pros: Simple, cheap, did the job Cons: acccuracy was highly dependent on how well the manufacturer made the unit, they are impacted by how well the inside of the muzzle device aligns with the barrel and the red laser faded out quickly in bright light and because they all use button cells of varying sizes the battery life might be short – especially the fake cartridge units. Note, a number of the muzzle end manufacturers do offer green lasers and that helps. Bottom line, they do the job and I do favor the muzzle end devices more provided they are from a quality manufacturer.

Then along came Wheeler Engineering with relatively large green laser unit with a strong magnet that sticks on the face of the muzzle (the end of the barrel). This got away from issues with the muzzle end units not centering and the frequent poor quality of the imported fake cartridge units. The green laser is powered by a relatively large CR123A battery that is the same used in many tactical lights. I should point out that they make a red laser version too but if I had to pick I would go with the green laser as your eye can see it easier and it reflects from further away.

This is the Wheeler laser bore sighter and it is the green laser unit. Note, I have a bettery in the unit and a spare Surefire CR123A in the holder. Steer clear of no-name cheap CR123A units as they have had issues in the past and caught fire, burst, etc.

I’ve used it for a few years now (I bought it in 2019) and have found two issues that affect it. First, the end of the barrel or your muzzle device (flash hider, muzzle brake, and so forth must be steel for the magnet to stick to it. By the way, I am not impressed by how aluminum muzzle devices hold up over time and just buy steel whenever I can.

The second shortcoming is that the manufacturer of the muzzle device and/or the barrel must have created a true end meaning the end of the barrel, the thread, the muzzle device – they must all result in an end of the barrel/muzzle device that is perpendicular to the barrel. The worst offenders in my experience are the muzzle devices because their positioning depends both on how well the threads were but on the barrel plus how well the device was made. Some combinations are better than others. If I were to make a generalization, unthreaded barrel muzzle faces from a quality manufacturer tend to be pretty true.

This is a quality Ballistic Advantage 20″ 5.56 DMR barrel. I’d expect its threads to be cut properly. The next variable would be how well the muzzle device engages the threads and how square the end of it is.
This is a IWI Galil Ace in .308. In a favorable nod to their manufacturing the factory barrel and brake yielded a remarkably close test pattern at 25 yards. I’m always amazed when boresighting is within inches and then going to range yields initial rounds within a6 inches of the expected center and this one did.
This is the strong magnet that secures the laser boresight to the end of the barrel or muzzle device. It’s also why either end would need to be steel for it to magnetically attach.
Here’s the unit secured to the end of a PSA barrel and PSA bird cage brake. It did the basic job of getting the rifle on paper with it’s Vortex UH-1 optic.
The power button is on top of the battery compartment and you can see the green laser hitting the off-white plastic cup. I like to sight in when the sun isn’t bright so I can get out 25-50 yards.

As with the other bore sighting devices, this unit will get you in the ballpark. Because of the factors above, you might be on the paper at 100 yards but you are better starting off at 50 and working things out from there.

By the way, one tip of any of them is to do your boresighting early in the morning or at dusk but not in the bright light of day. You can reach out 25-50+ yards and see the dot enough to do the initial sighting.

As a closing comment – none of them are perfect because they were all designed to be approximations. The final sighting must be done by you with the rounds you expect to use because a ton of variable will affect where you bullet actuall hits – your cheek weld, your trigger pull, factors with the bolt and barrel, how consistent the ammo is, the weight of the bullets, etc. My goal is to save some ammo and at least hit the target so I don’t have to shoot so many rounds to dial in the final settings and then begin working out firing solutions for different ranges.

In Conclusion

There actually isn’t a perfect solution – I mainly use the Wheeler Pro Green Laser Boresighter when I can but I still have a couple of good muzzle end units that I use when the muzzle device is aluminum. I know one unit is from LaserLyte and I really do not recall who the other is from. I do not use the dummy cartridge units after a few disappointing tries.

So, if you haven’t tried a Wheeler Pro boresighter and are in the market, I like mine.


Note, I have to buy all of my parts – nothing here was paid for by sponsors, etc. I do make a small amount if you click on an ad and buy something but that is it. You’re getting my real opinion on stuff.

If you find this post useful, please share the link on Facebook, with your friends, etc. Your support is much appreciated and if you have any feedback, please email me at in**@ro*********.com. Please note that for links to other websites, I may be paid via an affiliate program such as Avantlink, Impact, Amazon and eBay.


Do I need a drill press for drilling Polymer80 frames?

The question above is asked a lot and I can understand why – drill presses can make accurate holes. Surprisingly though – DO NOT USE A DRILL PRESS WITH YOUR POLYMER80 JIG! How’s that for an emphatic answer – now let me explain why this is so.

The cool jig that Polymer80 came up with is designed to be clamped from the bottom and three holes on each side to be hand drilled. All of the stresses and what not on the jig were planned so the holes would go in the right place. Laying the jig on its side to use a drill press has led to alignment problems and frames that don’t work so don’t use a drill press.

The jig is clamped standing up and a hand drill is used to make the holes. The smaller holes use a 3mm drill bit and the larger hole requires 4mm.

While we are talking about drilling – do a hole at a time and do NOT drill straight through. The reason you do a hole at a time is that you can afford the angle to be slightly wrong on one side but if you go straight through and the angle isn’t perfectly true then the hole on the other side will be way off. Trust me, do a hole at a time. Yes, do take your time and try to drill a hole that is perpendicular to the frame – meaning not at an angle one way or another off the center of where you need the hole.

Any 3/8 or 1/2″ hand drill will work just fine. A cool perk with the old Ryobi drills is that they have a level built into the tool holder.

Use 3 & 4mm Drill Bits

The frame needs 3 and 4mm drill bits and the jig is labeled for what size goes in what hole. If you need the bits, we sell nice drill bits that are perfect for this. Click here to go to our Polymer80 tool page.

I’d definitely recommend you use a vise to clamp the bottom of the jig. That’s what the jig was designed for.

So, you don’t need a drill press but I would recommend a vise to hold it vertically nice and steady. You can get pretty good deal on little 3-4″ removable vises that will work just fine or you can use any woodworking or metalworking vise if you already have one.

In Conclusion

No, you don’t need a drill press and for that matter you should not use a drill press because the jig was not designed for it. However, you do need at least a 3-4″ vise, hand drill and the right size bits to do a good job drilling. From there, you still need to trim your top tabs, remove the barrel block, clean things up and then you can install the parts of your choice.

We have a collection of Polymer80 tools to help you with your build. Please click here if you would like to see them.

Note, I have to buy all of my parts – nothing here was paid for by sponsors, etc. I do make a small amount if you click on an ad and buy something but that is it. You’re getting my real opinion on stuff.


If you find this post useful, please share the link on Facebook, with your friends, etc. Your support is much appreciated and if you have any feedback, please email me at in**@ro*********.com. Please note that for links to other websites, I may be paid via an affiliate program such as Avantlink, Impact, Amazon and eBay.



Add A “Thumper” To A Blast Cabinet And More Than Double Your Productivity!

Okay, Ronin’s Grips started making Yugo M70 grips sometime around 2004 and rapidly added models – the challenge was that I hand polished each and every one of them. It took a ton of time, handwork and was putting my carpal tunnel through the roof. Jeff Miller of HillBilly Firearms told me to abrasive blast the grips for a better grip and a heck of a lot less handwork. I was sold – I had to change something. Jeff also gave me a few tips – get a foot control to protect the seals vs. being in the cabinet with all of the grit, put transparency film on the window of the unit to make it last longer and he told me to get a “thumper” to make the grit settle.

Well, way back in the day margins were super thin so I bought a large bench top abrasive blast cabinet from Cyclone Manufacturing in Dowagiac, MI – they are about an hour from my shop and I could pick it up along with the foot control, I got a box of transparency film either from Amazon or a local office supply store, but I had no idea what a “thumper” was or how important it is to productivity.

Fast forward to about a month ago. Abrasive blasting used to take me a while – blast, hit the cabinet or manually move the material around in the hopper, blast some more, whack the cabinet or move the material around … it gets old. It took me years to realize that this really sucks but blasting was so much better than polishing that I didn’t think much about it.

So, a “thumper” is basically and industrial vibrator (insert joke here) that uses an electric motor in a housing with off center weights on the shaft that then vibrate like crazy when the motor runs. I guess you could call it the power of Amazon but one day I was scrolling through Amazon and a suggested item came up – a concrete vibrator – and it looked like a small motor in a housing. I had 25 Galil grips I was going to blast and all of a sudden I remembered Jeff’s advice.

Okay, the power of a vibrator with a blast cabinet is that the vibrations cause the grit to shake down to the lowest point constantly. You can blast and blast and blast. The unit was $118 with free delivery and I figured I would give it a try.

It shipped from the importer, not Amazon, and showed up a few days later – it was pretty quick as I recall. The unit was very well made other than my needing to tape up a plastic junction box on the power cord that was a little cracked and I needed to attach a 120 volt plug – it was one phase and they said about 40 watts so nothing special. The machine label says – 110V, 1 phase, 40 watts, 3600 RPM – the little thing totally kicks butt and was only $49.

Here’s a close up of the label – note it says 40 watts. There are bigger units but I don’t think you need them for an abrasive blaster.

I didn’t put it on the blaster right away because I wasn’t really sure how violent it would be and I am glad I didn’t – it vibrates like you would not believe – there is nothing subtle about it – and I immediately realized two things – 1) I was going to mount it on the free standing tool bench and not the plastic blast cabinet walls or it would eventually shake loose and 2) I needed a variable speed control to tone it down some.

Try #1

Okay, so sometimes you just have to poke fun at yourself – or at least I do. I marked the bolt holes on the 3/4″ plywood bench top and mounted the vibrator. I then plugged the power cord from the vibrator into the speed controller, the controller into a surge strip and turned it on at full speed.

I wish I had a before photo or a video of what happened next but I don’t. Every single thing on that table started vibrating right off of it. Yeah, all the grit went to the bottom on the blast table but the blast table was headed to the edge of the bench too. Whoa! I hit the off switch.

Try #2

I simply took some strips of plywood and added a cradle around the legs to limit travel. That worked. Time to try blasting some stuff.

Here’s the vibrator.
Here’s the speed controller.
Another view of the strips to limit travel. Everything on the floor had been on the workbench before I turned the vibrator on the first time 🙂 By the way, the 3/4″ plywood top is screws into the stands it is on.

Actually Blasting

Folks, it is night and day different – stunningly different. Because I don’t have to stop and whack the side of the baster or reach in and move grit around, I’d bet I’m getting work done 2-3 times faster. A bench top blaster doesn’t have a very deep bottom so without a thumper, I spent a lot of time moving grit over to the pick ,up.

Another fun lesson learned. Over the years, I’ve developed the habit of putting my chin on the plexiglass as I focused on doing the work. Don’t do that. I put my chin down on the vibrating plexiglass and it felt like someone was playing the tambourine with my teeth 🙂

Those are two IMI Galil grips getting blasted. What an amazing difference.

In Conclusion

This is one time I can honestly tell you that I have one regret – I should have done this years and years ago. Wow. It was worth it! I’ve used vibrator and speed controller both extensively for a little over a month and it’s a great combo. I don’t use the slowest speed but I am closer to the low end on the dial than I am the fastest speed.

Note, I got lucky with my first purchase. I really wasn’t sure what size to buy but the 40 watt unit has worked great. I can’t imagine anyone needing a bigger unit for a blast cabinet. These generic industrial vibrators have all kinds of uses including for the movement of powders, grains, rock, etc. so they sell bigger and more powerful ones as well.

I’d highly recommend this to anyone who has a ton of blasting to do and is getting tired of having to stop and manually move grit around.


Note, I have to buy all of my parts – nothing here was paid for by sponsors, etc. I do make a small amount if you click on an ad and buy something but that is it. You’re getting my real opinion on stuff.

If you find this post useful, please share the link on Facebook, with your friends, etc. Your support is much appreciated and if you have any feedback, please email me at in**@ro*********.com. Please note that for links to other websites, I may be paid via an affiliate program such as Avantlink, Impact, Amazon and eBay.



My Adventures With Rock Island Armory 9mm Extractors

Starting in 2021, I started to offer 10mm magazines for the Rock Island Armory A2 HC pistols – “A2” being a marketing opportunity to refer to the next generation 1911A1 pistol prototyping the US Army did starting in 2004 that experimented with different sights, extractors, mainsprings, etc. The “HC” stands for high capacity and reflects the RIA pistols are using a staggered magazine design to hold far more rounds than a single stack could.

At any rate, I had a number of customers ask me to produce mags for the 9mm RIA A2 HC pistols – the 51679 Tac Ultra and the 56645 Pro Ultra Match HC. Our 10mm mags had proven to be very successful and after enough requests, I decided to enter the 9mm magazine market.

11/6/23 Note – we no longer make 9mm magazine. There are a ton available from other vendors and our pricing wasn’t competitive. We still make mags for the 10mm and .40 S&W RIA A2 HC pistols just to be clear.

One thing I learned with making AK grips is that you really need to have the weapon to make a part for it. This allows you to check fitment, reinforce potentially weak areas, etc. So, when I started with the 10mm mags, I bought a 52009 Rock Ultra HC and later a 56862 Tac Ultra Match HC. Why? Because you also find that a given firearm may differ enough that if you build and test only with it, you may not be making something others can use.

There’s an engineering problem called “stacked tolerance”. Every part has a specification that says, for example “9.0mm” and then there is a tolerance specified – for example “+/- .01”. That means the part produced can range from 8.99 to 9.01 in size. Make an assembly and all of those tolerances may combine, or “stack” in such a way that if you build a part to work for that particular unit then another assembly that happens to stack in the other direction may not be able to use that part. Testing on multiple pistols helps with a testing – at least a bit because you are reducing the odds of one pistol having a problem or working and others not.

So, by having both the 52009 and 56862 10mm pistols, I could test magazines to make sure they fed right, dropped free, etc. With the 9mm pistols, I had limited funds and just started with the 51679 – the Tac Ultra. That decision bit me hard.

The Initial Magazine Prototyping Didn’t Make Sense

When I prototype, I buy a bunch of original magazines and then start looking for what is close enough to modify and start tinkering with the feed lips, feed angles, the spring and the follower. To keep track of things, I applied numbered stickers to every magazine and kept track of the dimensions plus performance.

What I also learned with the 10mm mags is that the best dummy rounds are the machined aluminum A-Zoom Snap-Caps. Dummy rounds that are made from a case and a bullet will see the bullet pushed back into the case and/or get deformed after some fairly low number of cycles. The machined aluminum A-Zoom Snap-Caps are dimensionally accurate and can cycle hundreds of times before needing to be replaced. By the way, don’t do this type of work with live rounds – it’s an accident waiting to happen.

Back to the 9mm world, I was working on the mags and things just didn’t make sense. A magazine would work and then it wouldn’t. One set of dimensions would work and then they wouldn’t. Something just wasn’t adding up. The pistol would fail to eject randomly, I’d then have the old round and the new round in the slide at the same time and of course it jammed.

It had to be the mags right? I blew through a bunch of mags and time before it dawned on me that the pistol itself must have issues. I hadn’t questioned it before because the pistol was brand new out of the box. Sure, I had cleaned and lubed it first before cycling hundreds of snap caps through it. The problem was that I assumed it was good to go and the initial testing seemed to show a reliable pistol … but I only tested a few mags worth of snap caps – maybe 34-52 cycles max.

Testing The First Pistol

I loaded a magazine up, racked the slide and loaded a snap cap. I then pulled the slide back slowly and the extractor lost control of the extracted round as I pulled the slide to the rear. That wasn’t supposed to happen. If I went slow, it would either fail to extract completely or lose control of the round.

I’m not a 1911 gunsmithing guru but I had to learn some stuff really fast. I knew if I sent the pistol back to Rock Island/Armscor, it would be at least a month before I would get it back. So I read posts and watched videos that explained the pistol had an extractor problem and how to correct it. I bought a few different brands of 9mm extractors, the Brownells extractor tool, the Jack Weigand extractor gauge and tensioning tool.

Boy, I could not get that thing to work even after trying a few different brand extractors and a Wilson. At this point I was pretty ticked off. My last best guess was that the extractor looked like it was clocked slightly. When I inserted the Weigand 9mm gauge, I could feel initial tension as I inserted it and then it would drop off rapidly as I inserted the gauge the rest of the way (it centers over the firing pin hole). Rather than do a new firing pin stop plate, I decided to stop chasing best guesses mainly because I was blowing time I did not have to spend. The pistol was under warranty so feeling both stupid and defeated, I finally got an RMA to send the pistol back.

No, I’m Not Incredibly Patient

In the meantime, I bought a 56645 Pro Ultra Match HC and it has worked great – no problems at all. I was able to work out the details on the mags. Now, I am not patient so I actually ordered a second 51679 Tac Ultra that I looked at, cycled a few rounds through but really didn’t use a great deal – my primary go-to test platform was the 56862 … until I decided to take some photos about the RIA 9mm A2 HC pistols and looked at the 51679’s extractor.

The second 51679 is at the top and the 56862 Tac Ultra Match is at the bottom. The Match pistol has nice checkering on the front of the grip, the top of the exposed barrel is a grey matte finish and has a target rear sight.

“You’ve got to be kidding me” – I thought to myself. Inserting a choice F bomb of course. The extractor in the brand new 51679 that probably has less than 100 hand cycled Zoom snap caps through it was almost completely broken off other than a little tiny nub on one end. WTF?!?!

I was happily taking photos for a blog post when I saw the silver grain of the busted extractor. Yeah, I was swearing up a storm. Really?

Okay, two 51679s bought from different vendors off Gunbroker about a month apart both having extraction problems …. wow. I’ll be honest – I’m disappointed. RIA 1911s are econobox models but they usually work – so, no, I’m not remotely happy not to mention jumping through hoops waiting for ever for their customer service to respond. I did learn a bunch though and will share with you what I did and what you can do if you want to.

Metal Injection Molding For Extractors Isn’t The Best Choice

The problem is that to keep costs down, Armscor, who owns the Rock Island brand, make the ejector using Metal Injection Molding (MIM). If you search on the web, you will see a ton of guys arguing against the use of MIM in high stress parts. As I just learned with extractors, it’s not the strongest manufacturing approach – making them from forged high-quality steel is a far better idea.

I removed the extractor from the pistol and zoomed in as best I could to get you this photo. You can see the grainy structure that is a signature of metal injection molding. That nub at the top right edge in the photo was just enough to yank the case out of the chamber … sometimes.

Okay, if you get a new RIA 9mm pistol, check the extractor out of the box. Clean and lube it, go to the range and keep your eye on the extractor. If it breaks you have two options – send it back to Rock Island/Armscor for a RMA repair or do it yourself. Heck, you could even just replace the extractor yourself before you have a problem if you want to.

I Decided To Replace the Extractor Myself

I learned a ton on that first pistol plus I had all of the tools and spare Wilson Combat extractors. I just needed to trust in my abilities a bit more and try it again. If there’s one thing I know about myself, it’s that I am persistent and don’t give up easy. With this in mind, I dove back in again with far better results.

The top is the failed Rock Island 9mm ejector and it is a series 70 design. The lower extractor is a state of the art forged 9mm extractor from Wilson Combat. It is a series 80 design but will work just fine in a series 70 pistol.

First, let me explain why I went with a Wilson “Bullet Proof” .38/9mm extractor. They have an excellent reputation a number of guys posted about throwing away their RIA ejector and installing a Wilson. Instead of being MIM, here’s what Wilson says about their extractors:

  • Fully Machined from S7 shockproof tool steel with a tensile strength of 275,000 PSI
  • Optimized hook design for maximum strength and case rim contact
  • Hook location tolerances held to +/- .001″
  • Radiused corners for extended life and smooth feeding
  • Enhanced design holds tension longer over factory part many times over
  • Heat treated to optimum hardness and cryogenically treated
  • Guaranteed for life against breakage or we will replace at no cost to you

Note: I went with a series 80 extractor because they were in stock even though the RIA pistols are based on a series 70 design. You can use a series 80 extractor in a series 70 pistol but not vice versa. You can get them from Brownells, Wilson directly and other places.

Recommended Tools

You don’t need specialized tools but if you can afford them, I would highly recommend the following:

The long angled tool is the 1911 Extractor Tool from Brownells and totally worth it in my opinion. The long angled end lets you reach into the slide and push extractor back and then down into the hole for removal. The other end is perfect sized for pushing down the firing pin to aid with the removal and installation of the firing pin stop. Note the blue A-Zoom snap cap – that is the color of their volume packs of rounds. Exact same material and tolerances – just a different color.
The silver block with the red handle is Weigand’s tool for adjusting extractor tension. The big orange thing is the Lyman mechanical trigger pull gauge. The brass plate is the gauge with a brass S-hook that I added. The gauge is sold as a set and each end is for a different caliber. The hole you see is actually for lining up on the firing pin hole – I just added the S-hook on the .38 end because I don’t have any plans to shoot .38 Super. Note, the small blade screw driver makes it real easy to nudge the firing pin up or down so the firing pin stop plate can be pushed into position.

Polish the Extractor

From what I read and saw, the Wilson extractor is practically ready out of the box other than setting the tension. Some guys recommended polishing the surfaces where the cartridge will come in contact and I did that with one of the small rubberized abrasive polishing bits in my Dremel.

How to Install

Make sure your pistol is unloaded – that the chamber is empty and a loaded magazine is not inserted. In short, work safe. Also, do not use live ammo for testing – I highly recommend A-Zoom Snap Caps.

Let me give you an overview and then a couple of videos to watch:

  1. Remove the slide
  2. Remove the firing pin stop plate by pushing down with the straight short end of the extractor tool and then slide the plate off. Be CAREFUL that the firing pin and/or spring don’t come flying out as you remove the plate.
  3. Push the extractor backwards by pushing the head of extractor backwards down the hole out the rear of the slide
  4. Insert the new extractor and line it up so the stop plate can be re-inserted. It needs to line up with the top and bottom of the stop plate groove and it needs to be straight up and down parallel to the sides. You don’t need to install the firing pin and spring until you are done.
  5. Insert the Weigand gauge and pull it out using the trigger pull gauge to find out how many ounces it takes.
  6. Use the Weigand tensioning tool to increase or decrease the tension. I dialed mine in to 28 ounces (1.75 pounds).
  7. You can try testing feeding and extracting dummy rounds to see how it performs. The extractor should maintain control until the extracted dummy round hits the ejector.
  8. Once it is dialed in, you can then re-install the firing pin return spring, lube the firing pin and reinstall it also.
  9. There’s a trick to the plate – wiggle it in and push down the firing pin enough to get the plate to sit on the “shelf” at the rear. You can then maintain pressure on the plate and use the other hand to use the extractor tool to push the firing pin down far enough and hold it there while you push the plate back into place.

More Details

Wilson has a video on how to change to their extractor and a bit about setting the tension:

Now, I also read the Brownell’s blog post about extractors plus a more detailed Wilson Combat instructional PDF file.

The following is a video of Jack Weigand explaining how to use his extractor gauges and tensioning tool:

Adjusting The Extractor Landing Pad

The most detailed post and guidance in general about extractors that I read is here – and if you read down, you will get to sections/replies about 9mm extractors. One thing you will notice discussed is reprofiling the “fitting pad” to better fit the radius of the extractor hole. I stoned and polished the fitting pad to be more rounded but that was it. I put more emphasis on getting a weight in the 25-28oz range and did do that after may 3-4 tries.

Pulling the gauge out the final time was about 1-3/4 pounds which is 28 oz. In testing the pistol, extraction was just fine.

Was The Match Pistol Higher End?

I wondered if maybe more care was put into the match pistol. There are some nice perks in terms of features but the trigger feels about the same between the two pistols. I’ll write up something more detailed down the road – for now let me just say they pistols are not night and day different in terms of how they feel with cycling the slide or pulling the trigger.

In terms of pricing, there’s not a huge difference on Gunbroker. The first 51679 was bought on 3/5/22 for $819.99, the Match pistol was $899.00 on 3/25/22 and the second 51679 was bought on 4/3/22 for $899.00 also. In writing this, it’s surprising that the Match wasn’t $100-200 more on the street but it wasn’t. If you look at the manufacturer’s suggested retail price (MSRP) – Armscor did set the 51679 at $899 and the Match 56645 at $1099. In other words, Armscor was hoping the Match would command a premium.

You can find the 51679 pistols right now with a bit of hunting. The 56645 match pistol is challenging to find as it seems to be a bit more rare now but it is out there too. I’d tell you to get the 56645 Pro Ultra Match HC if you can find it. As you can imagine, I’m not too thrilled with my 51679 experience right now and there is little to no price difference *if* you can find one.

Conclusion

I’m not sure what to tell you about what happened – I only have data from two 51679 pistols and one 56645 pistol. It could just be really bad luck – neither of my current 10mm pistols have given me any trouble and the 56645 Pro Ultra Match has been fine so far as well although I have only cycled maybe 500-600 snap caps through it so far.

The first 51679 had something going on that I can’t explain and am waiting on Armscor to fix it under warranty. It certainly was not a broken extractor. For the second one to have a snapped extractor claw with so very few rounds – I guess that highlights the limitation of MIM and that forged extractors are better – there’s a reason why Wilson’s Bullet Proof extractors have such a good reputation.

6/22/22 Update: RIA did a warranty repair after about 4-5 weeks. All they told me was that they confirmed the extraction problem, fixed it and the pistol was fully operational now. So, I still don’t know exactly what happened but at least Armscor/RIA stood behind it and made things right.

We’ll see what Armscor comes back with regarding the first pistol and I’ll report it here. I guess the big thing I want folks to know is that changing an extractor is not an arcane black magic endeavor. There are tons and tons of videos and posts that you can read. At some point you just need to wade in, give it a go and learn.

My other lesson learned is that don’t replace a busted Armscor extractor (MIM) with the same thing. Upgrade. I decided to go with Wilson Combat due to all the good reviews I read and would recommend that.

I still have a lot to learn about 1911s and don’t claim to know much. I’m really focused just on the mags but I hope this helps out anyone who reads it.

A Stunningly Good 1911 Reference Book Recommendation

By the way, If you want a really good book with tons of dimensions, drawings and photos, then get Jerry Kuhnhausen’s “The Colt .45 Automatic – A Shop Manual”. What I bought off Amazon is the “New Expanded 10th Edition” published in 2015. It gave me a better understanding about the extractor and the firing pin stop.

I hope this post helps you out!

6/29/23 Update: The match 9mm MIM extractor is still doing just fine and I have no idea how many thousands of times it has been cycled. The Wilson is doing great on the other pistol also.

12/17/22 Update: I’m somewhat surprised – the original MIM extractor in the Match 9mm is still doing just fine thousands of rounds later. So is the Wilson but I am not surprised about the Wilson holding up.


Note, I have to buy all of my parts – nothing here was paid for by sponsors, etc. I do make a small amount if you click on an ad and buy something but that is it. You’re getting my real opinion on stuff.

If you find this post useful, please share the link on Facebook, with your friends, etc. Your support is much appreciated and if you have any feedback, please email me at in**@ro*********.com. Please note that for links to other websites, I may be paid via an affiliate program such as Avantlink, Impact, Amazon and eBay.




Got Startled Looking At My Dad’s M1 Garand – The Stock Had Dried Out

Some of you who know me as “ronin” back on the AKFiles way back when may recall that I bought my dad a M1 Garand, his bucket list rifle, back in 2011 after he was diagnosed with cancer. Just in case something ever happened to the AKFiles post, I had saved the text and photos and put them into a blog post on my site [click here].

My dad passed away in 2014 and I couldn’t even look at the rifle – it just hurt too much. I talked to one of my best friends, Scott, about it because he’d lost his dad too and he told me to just tuck it away and look at it some day in the future. He knew the rifle meant a lot to me and I took his advice.

So fast forward to the present time. I finally decided it was time to look at the Garand and make sure it wasn’t rusting. I recalled oiling it before putting it away the last time but that was six years previous. At any rate, I opened the CMP case up and everything looked good.

I then rolled back the Limbsaver pad off the butt of the stock – I’d put it there so the rifle wouldn’t kick my dad too hard – and the wood had visibly dried out under the Limbsaver. I really don’t know why – it must have been something to do with the polymer in the Limbsaver slip-on pad and the linseed oil on the stock.

I saw the dry wood and literally thought “Oh no”. Then I got a grip, realized it was just dry and tracked down what type of linseed oil to get.

It was a shock and really started me. My dad was the one who taught me how to shoot and clean firearms. That I might have let him down and hurt his rifle did not sit well at all.

The Limbsaver pad worked great with my dad. I guess I shouldn’t have left it installed for six years. By the way, I am not blaming the recoil pad – Limbsaver pads are my favorites to help tame recoil.

It turns out that the original buttstocks were finished with linseed oil and the dark reddish color they take on over time is from the linseed oil oxidizing. This was real linseed oil that is sometimes called raw or pure linseed oil and not boiled linseed oil that will have chemicals added to it to speed up the drying time.

I did some digging and found SunnySide Raw Linseed oil on Amazon.com in both pint and gallon containers. If you are touching up wood, a pint is plenty. I bought a gallon to have for other uses and I may have it a long time given my current rate of usage.

All of the local hardware stores had boiled linseed oil and I was able to find this on Amazon.

With raw linseed oil, be very sure to lightly applied it to the wood and let it soak in and dry before applying the next. I did two very light coats over several days. Never put it on thick or it will get gummy and may never dry.

As I was applying the first coat I could already tell it was going to look amazing.
I was still appling the linseed oil at this point but notiice the dry area is gone. Even after the linseed oil cured it was gone.

Also, there is a real important fire hazard you need to know. When linseed oil dries it gets hot and can spontaneously combust. You do not want to crumple up towels that have linseed oil on them and toss them in your trash – they just might ignite.

I take my old towels and burn them in my burn barrel. Some guys who can’t do that will lay the towels out flat on bricks or concrete that can’t burn and let them dry before throwing them out. When laid flat they do not get hot enough to catch fire and are safe once dry.

Ignore the mess and look at the wood.
Here’s a close up of a cartouche after two coats.

Let me reinforce an earlier comment – this stuff dries slow. Apply it thin, let it dry all the way before you install the next coat. I would definitely recommend making sure it is fully dried before putting the rifle back into a case or the padding in the case may stick to the finish. I guess a hard lesson learned for me from years ago is that when it comes to finishes, you need to do your homework about how to apply each type and be patient. When I was younger I was very impatient and ran into different problems many times. With my dad’s Garand, I knew to be very patient.

Summary

If you have a Garand with a dry stock, try appling one or more light coats of raw linseed oil and let it dry all the way. The results were amazing. So, I checked the Garand over all the way, oiled it again, left the slip on recoil pad off the stock and put it back in storage. Maybe I will take it to the range this summer and remember my dad.

I hope this helps you out.


Note, I have to buy all of my parts – nothing here was paid for by sponsors, etc. I do make a small amount if you click on an ad and buy something but that is it. You’re getting my real opinion on stuff.

If you find this post useful, please share the link on Facebook, with your friends, etc. Your support is much appreciated and if you have any feedback, please email me at in**@ro*********.com. Please note that for links to other websites, I may be paid via an affiliate program such as Avantlink, Impact, Amazon and eBay.