Since Kalashinkov USA introduced the KP-9, I’ve had a handful of guys ask me to make a quick takedown pin for it. Well, it turns out it is a unique size and the hinge pin would need to be around 3.75mm – smaller than what any of my vendors could reliably hit. My existing pins all have a diameter of .156″ or about 3.96mm so they would not work.
So, what to do? I’d bought a KP-9 with their brace and it was a nice weapon in terms of fit, finish, and operation. I’d pressed out the unique hinge pin and saved it so I could have replaced it but I decided to go another route. By the way, the original pin was swollen at the ends from being set but the middle measure 3.75 so that’s the number I was going with.
KP-9 right out of the box.
There’s the hinge pin between the rear sight and the start of the dust cover rail.
There is a spring on the pin to help the dust cover pop up when the recoil rod is pushed in. Note, the fitment of the cover to the rear sight block and rear trunnion is very good. If it weren’t for the spring, the cover would stay down. By the way, the big black round thing you see on top of the barrel pin has a groove behind it. When the brace is swung into the folded position, a tab on the brace goes into the groove and holds it in the folded position.
This is the origianl hinge pin and the spring that pops the dust cover up. The pin is 2.75mm wide and about 24-25mm long – mine measured 24.31mm after I pressed it out. Some deformation would have occurred when it was pressed in and the ends flared open.
How To Remove The Original Pin
I used a punch on my air hammer to pop the old pin out. You could also press it out or drill it out.
I used my ATS air riveter to pop out the pin in a matter of seconds. You could press or drill out your pin.
Reaming the Hinge Hole
If you look at the hinge, there is enough material around the hinge pin material to ream it out a bit. I decided to get a 0.1563″ (3.97mm) cobalt reamer and a 4mm cobalt reamer. My thinking was to first try the smaller reamer and if that proved to be too small, I’d step up to the 4mm (0.1575″). I bought mine from McMaster-Carr but you can get them from any reputable vendor.
Reamers are cool – they make perfectly round holes and you can do them in a hand drill if you are so inclined, which I was. Secure your weapon in a vise so it can’t move, use a drill bit or other pin to align the hinge parts from the other direction. As you ream, this slave pin, or alignment pin, will be pushed out of the way as a reamer’s head is blunt.
Put your reamer in your drill chuck and coat it with cutting oil, then slowly insert the reamer into hole – let it cut – don’t force it. You’re not taking off a ton of material so I reamed the hole out in one go.
The slave pin did it’s job and I had a true hole in the end. Okay, the .1563″ reamer’s hole worked but was too tight – If you don’t intend to pul the pin much, it would work but it was not what I wanted. I then did the same thing by inserting a slave pin but this time used the 4mm reamer and it worked great.
You see, getting the hole size right matters a great deal compared to some weapons such as the M92 and Krinks – they want to cam the cover up so there is tension that locks everything in place. With the KP-9, the fit of the dustcover relative to the rear sight block is so good that there isn’t tension so you need the quick takedown pin to fit snugly and the detent ball to do its job.
Here’s the full view of the hinge. Note the detent ball on the pin that keeps it from accidentally sliding out of the hole.
The way a quick release pin that has a ball bearing detent works is that a spring is behind the ball bearing pushing it up but it is captured in the hole. By sticking up, the ball bearing limits travel. Having a circular surface if you pull hard enough during extraction then the ball bearing is pushed down, the pin pulls free and then the spring pushes the ball bearing detent back up once it is clear.. Insertion is just the reverse.
In closing
I really like how it turned out. For folks who want to add a quick takedown pin, just order the AK-V pin [click here to open that page in a new tab] and then ream your hinge open. Note, you might want to get the same size reamers and see which you prefer – start with the smaller one first of course.
The pins make removing the dust cover really easy.
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.
Okay, I wrote about Galil Ace .308 Pistol some years back and it got sold at some point to fund other projects. However, when I sell firearms it’s not that there was any problem – like tons of other projects, I finished it, learned from it, got bored of it and sold it … that’s my usual progression for 99% of the firearms I buy. At any rate, some time last year it really dawned on me that the hands down best factory manufactured rifle that you can buy in the US today are the Galil Aces. I’m sure someone will argue with me but the evolution of the design that they did is remarkable regardless.
This is the original 308 Galil Ace before updates. I took the photo right as the sun was going down so everything had a bit of an orange hue to it.
RS Regulate Handguards
So, I bought a .308 Galil Ace rifle knowing I would get rid of the handguard. Yes, the factory one is functional but it is way too fat for me I prefer a long narrow one aluminum handguard. Even before I bought the rifle, I knew I would get one of RS Regulate’s GAR-14M-N handguards. The biggest problem you will run into with an RS Regulate product is finding one – his scope mounts are the best out there and the handguards are excellent as well. As a result, you may have to hunt around. I found one in grey thinking I would refinish it but the contrast actually looks pretty cool so I am running with it.
The original handguards do have rails under those covers but the combination is too fat for my taste.
This is the RS Regulate GAR-14M-N handguard in Desolation Grey. Installation is very straight forward and instructions are provided.
The two short screws and spacers are for attaching the handguard to the barrel. The long screw is for the rear. Install the rear end cap before you install the rear screw. Use blue Loc-tite on all. Use needle nose pliers to hold the spacers in place when you side the side screws into the handguard and on to the barrel.
The end cap goes to the bottom rear of the handguard and sits on the inside. Two additional short screws are in another bag for it. See the long needle nose pliers at the top? Something like them will enable you to install the spaces very easily.
This is the end cap right before I installed the screws.
Vortex PST II Scope
Because of the accuracy reports (1 MOA-ish) I also planned on getting a decent scope to make the Ace a designated marksman’s rifle (DMR). To explain, a DMR is a supporting rifle that usually has better accuracy and/or reach than the rest of the squad but it typically doesn’t have the accuracy of a true sniper rifle. From what I read, the Galil Ace would fill a DMR role no problem so I wanted a scope with a decent range starting with a low value so I would have a decent field of view (FOV). What I bought was a Vortex PST II 3-15×44 — first off, Vortex is my favorite scope maker and second, the second generation PST scopes are very clear and have good light transmission. I purposefully did not go with a 50mm objective because while it does pull in more light all things being equal, I didn’t want an topic standing up a mile above the receiver either.
American Defense Scope Mount
I’ve become a scope mount snob over the years after having a ton of problems with cheap ones – screws stripping out, moving on the rail, letting the scope move, quick release levers that bend on break off, crappy finishes, etc. To be honest, I am done with the cheap ones. My go to for scope mounts is American Defense – I also use the offset Vortex mounts that are also made by American Defense.
Why American Defense? They are solid quality all the way through – they are everything the cheap ones are not and have never let me down. So, yes, I will pay a premium for them and be happy about it. For this build and the smaller objective, I used a AD-Recon-X-30-STD.
This is an American Defense AD-Recon-X-30-STD scope mount with quick release levers. Excellent quality.
In Case You Are Wondering – Why .308?
Well, I am done adding yet another caliber and had a good selection of range and match .308 ammo that I can try out. When I do take this to a range, I’d like to find out what this particular rifle likes and buy more. By the way – for folks relatively new to firearms – you will find out that some ammo works great in one firearm and horrible in another so always experiment and find out what load your rifle likes. Handloaders spend hours agonizing over every possible details to find the round that works best at a given range and situation.
The Result
It came out pretty cool – I thought I would refinish the grey but it grew on me.
In Closing
The .308 Galil Ace is pretty slick. I really like the components I picked and now need to find time to go to the range. I will be adding a Magpul bipod before then as well.
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 info@roninsgrips.com. Please note that for links to other websites, I may be paid via an affiliate program such as Avantlink, Impact, Amazon and eBay.
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 info@roninsgrips.com. Please note that for links to other websites, I may be paid via an affiliate program such as Avantlink, Impact, Amazon and eBay.
Ok, now that I have your attention with that title, I often get asked how to fit the various furniture parts of an AK to a given rifle – the gas tube cover / upper hand guard cover, the lower handguard and the buttstock. Most of the work can be done with a secret tool – a slightly modified single cut file and patience.
Most of the time with new furniture, you need to remove material and a single cut file works great for that. With the pictured PSA Redwood furniture set, I needed to think the half circle ends of the gas tube cover and I also had to fit the lower hand guard just a tad.
This is an 8″ single cut Nicholson Handy File that I bought many years ago and modified. I prefer a single cut file so I can go slow and not remove material too fast. Just remember an old saying – “it’s easier to take more material off than it is to put it back on.”
Now here’s the trick to really make this tool work for fitting furniture – grind one thin side smooth – literally get rid of the file’s teeth. This will allow you to quickly and easy run the file right against a raised edge, such as the lips of the gas tube cover, and remove material that you want while leaving the raised edge untouched.
I find an 8″ file just the right size. 8″ is the measurement from the front edge, or “point” of the file, to the base of the heel – the bottom of the main body before the tang starts.
Any brand of file ought to work. Some come with a “safe” edge meaning no teeth. Just test it first to see if any of the teeth from the perpendicular surfaces protrude enough to cut – if they do then knock them down so the smooth surface can ride on the material you are working on with zero cutting happening from that side.
I used my big belt sander and removed all the teeth from this one edge and ensure it was smooth. I purposefully left the teeth on the other thin edge.
Just be patient – look at where the furniture is binding, remove a small amount and test the fit. In general, you want AK furniture to fit snug vs. rattling around. Patience is the key though – don’t rush things. Just keep inspecting, filing off a bit and testing over and over.
So everything is installed, nothing broke because I rushed and the end result is nice snug fitting furniture.
Summary
A single cut file with one thin edge ground is the secret tool but you need to be patient when using it. I can’t even begin to guess how many lower and upper handguards I have adjusted with this file over the years plus I have learned a bit more patience as well.
Building an AK takes a fair amount of drilling, fitting and riveting that can intimidate someone thinking about building their first rifle. Lucky for them, the industry has evolved a lot of really cool tools exist to enable faster higher quality results. A good example of evolution is the location and drilling of the the rivet holes in the receiver for the front and rear trunnions.
Back around 2006 or so when I got started, you either measured the location of the trunnion holes and marked them or you could take a post it note, push it on the trunnion to get an outline of the holes and then transfer it to the receiver, again marking where to drill. You learned quick to start with a small drill bit so you could adjust a bit if you were off with either method – I got pretty good with the post it note method actually.
One of the AK-parts and tool vendors that has been around the longest is AK-Builder and he was always bringing new offerings to the market, I slowly added one of all of his tools as funds permitted. I had his rivet jig, flat bending jig, the top rail layout jig (if you remember those) and so forth. At some point he added a really, really cool jig for locating and drilling the holes for the trunnions. I bought it and swear by it to this day.
The jig is extremely well made and durable. When you buy it, you have options for the sizes of mandrels to fit different barrel channel holes. The red one you see works on 7.62 AKs and they also have one for 5.45 and the unique MAK90. The rounded rectangle on the right holds the rear trunnion.
Using It For The Front Trunnion Holes
Using this fixture is about as easy as it gets but you must have a drill press. I’d recommend an X-Y table on your drill if you plan to do this much but at least have a drill press.
Securely mount the fixture to your drill press.
Insert the trunnion and tighten the knob so it can’t move.
Move your drill table around to line the drill bit up with the hole in the trunnion.
Slide the receiver over the trunnion.
Lower the drill and it will go in the exact same location as the trunnion hole you lined up on.
The front trunnion is being held securely by the fixture. I am sliding the receiver forward and when I bring the drill down, it will make the hole in the exact same spot as what was in the trunnion.
This fixture is the best means I have found to quickly and accurately locate and drill the trunnion holes in the receiver. I prefer undrilled receivers because with this jig I can put the holes exactly where I want them. By the way, these are AK-Builder rivets also.
Tips For The Front Trunnion Holes
Confirm the drill bit sizes you need before you start. For most AKMs, the front rivet holes are 4mm so you can use either a 4mm or 5/32″ (3.868mm) bit. Note, that dimension can be different so just confirm is my point. Also, I’d recommend good cobalt bits personally.
Use cutting fluid – I like Tap Magic personally.
You will drill a hole at a time – do not try to go all the way through. Small alignment errors become big problems when you do that. Avoid the grief – do a hole per rivet.
Make sure the table can’t move, that the fixture is secure and that the trunnion is being held firmly. If anything moves, you are hosed.
Line up on the hole, slide the receiver all the way on, pull it back just enough to verify nothing moved one last time.
After I drill the first rivet hole I carefully inspect everything is lined up. I then move to the second rivet hole and repeat the above but before I drill, I insert temporary rivets in the holes to make sure nothing moves. DO NOT SQUISH THEM – I literally am just using their bodies to keep everything lined up. It really helps avoid small movement errors.
If you mess up real bad for some reason, weld the hole shut and start over.
Doing the rear rivet holes uses the other side of the drilling jig. The little rectangular tab goes into the top of the rear trunnion where the recoil spring rod normally sits and you can then crank it down tight to hold it in place while drilling.
Notice the receiver will be parallel to the jig during these operations. Again, make sure everything is secure and you need to make sure the back of the receiver is true to the rear of the trunnion.
The end result will be accurately located holes. Before you set the rivets, this is when you should be thinking about a side rail for optics if you want one. I like the AKM side rail mount from AK-Builder. Those holes you will need to manually locate and drill. Use a caliper and true the top of the rail to the top of the receiver if you do install one.
Tips For the Rear
First, read all the tips I wrote for the front trunnion if you skipped them.
The key to all of this is a solid setup and nothing moving.
Confirm the size drill bit you need. It will probably be 4.5mm which you can do with that size drill or be close with 11/64″ (4.365mm).
DO NOT DRILL STRAIGHT THROUGH. I’d recommend you take your time and do a hole at a time.
Once you get a hole drilled and are ready to do the next, stick a rivet in it to prevent movement.
Summary
The AK-Builder drilling jig is the best tool I know to help you quickly and accurately locate and drill the front and rear trunnion holes in your receiver. I definitely recommend it.
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 info@roninsgrips.com. Please note that for links to other websites, I may be paid via an affiliate program such as Avantlink, Impact, Amazon and eBay.
Okay, there are a ton of ways to remove rivets and I’ve posted some details both about removing the trigger guard and side rail rivets (if your AK has a side rail). This post is going to get straight to the point.
I use a 4.5″ cordless Ryobi angle grinder and take all the rivet heads down flush. Unless I plan to reuse the receiver, I don’t care how the receiver looks when I’m done. If I do care, then I will be much more careful and stop just before I get to the surface.
I then center punch all of the holes to make drilling easier. I like to use an automatic center punch so I can focus on where I want to make the divot for drilling vs. trying to keep everything aligned. If you’ve never used one, they are worth their weight in gold.
I drill an 1/8″ hold in each one use quality cobalt drill bits and cutting oil. I like to buy Tap Magic in bigger containers and then transfer the fluid as needed into smaller squeeze bottles with long metal tubular “needle” tips so I can precisely put it right where I need it.
From the top – 1/8″ drill bit, roll pin punch and an automatic center punch on the bottom.
I then use a roll pin punch where the rounded tip can fit in the 1/8″ hole and the shoulder properly engage the remaining rivet. Folks, this makes removing the remaining rivets super easy except for the long trunnion rivets.
For the short rivets, I like to drill them out with an 1/8″ bit to both create a hole and relieve stress. I then use a roll pin punch to easily knock them out because the ball end of the punch keeps it centered on the rivet. If you’ve ever fought with keeping a normal punch centered while hammering, a roll pin punch centered in a hole makes a night and day difference.
Long Rear Trunnion Rivets
Okay, these take more work so we’ll make a section just for these little headaches. They’re not horrible – they just take additional time to remove but I will tell you a HUGE time saver in a moment.
In general, it’s easier to remove the rivets with the trunnion out of the receiver. If you need to save the receiver, be gentle and use successively larger drill bits to remove the rivet heads so you can then pry the sheet metal receiver open and pull it out. The balancing act is that if you make the receiver holes too big then you will need to weld them shut and drill new ones. It’s not the end of the world. I prefer welding and redrilling compared to using even bigger rivets with heads that cover the holes but are mismatched to everything else.
If you don’t care about the receiver or are removing stubs, grind those heads down and use an air hammer chisel to easily bend the receiver sheet metal away from the receiver.
With the rivet heads ground off you can clearly see the rivet body outline and thus you can mark the center.
Traditional Method – drill in from each side about 1/2 way and then punch the rivet out. Guys will use 5/32″ (3.969mm) or even 11/64″ (4.366mm) drill bits. If you are spot on the center and you have access to quality cobalt metric bits, this is usually a 4.5mm rivet so you could use that. You will read about guys suggesting 3/16″ drills but this route is problematic because 3/16″ is 4.762mm and thus too large. You’d need to use a 3/16″ rivet to properly secure the trunnion and the heads will look noticeably different from the others.
Old school – drill the rivet out most of the way and then punch it out the rest. You can see the pin exiting to the left. Note, do this on a hard surface that isn’t going to flex and absorb some of your blows. Here I am literally beating the crap out of the punch on the concrete floor. I’ve since moved on to a method using an air hammer that I will describe next.
The impatient Ronin method – drill 1/8″ centered holes in one side of the rivets left in the trunnion. Make or buy an 1/8″ air hammer drift pin and chase each long rivet out in a matter of seconds. It’s amazingly fast. I don’t know who invented the air hammer but it is seriously magical when it comes to tasks like this.
I can pop out a rivet in seconds using an air hammer and my rivet fixture. I took two old .401 shank air tools and drilled center holes. One is 1/8″ and the other is 5/32″. I then have a variety of lengths of 1/8″ and 5/32 dowel pins to do the job. I built both diameters but really I just use the 1/8″ punch now. I put the trunnion in a heavy metal working vise and start with a short pin to start the push and then a longer pin to chase it all of the way out. It works like a dream. If you do this, please, please, please wear safety glasses. A hardened dowel pin can brake in these situations. For an air hammer, I am using an IR 116 – a 4x air riveter ought to work also, I have a 3x ATS but have never tried it for this.
Summary
Use an angle grinder to knock off the rivet heads, drill and punch out the short rivets. For the longer rivet, decide which of the two methods you want to use. 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 info@roninsgrips.com. Please note that for links to other websites, I may be paid via an affiliate program such as Avantlink, Impact, Amazon and eBay.
The Kalashnikov design team took an interesting approach to mounting scopes on AK-Rifles. Rather than centering the optic over the bore they placed a mounting rail on the side of the receiver. There are different types depending on the model of rifle in question but one thing that pops up from time to time is whether one can be removed.
The short answer is yes. Now I add in the “but” – it is going to leave you with a receiver that not only has holes in it but receiver material that was forced into a countersink so you will have at least the center rivet area on the sheet metal receiver that will probably stick out like a little volcano taunting you.
Center punch and drill out the rivets. The rear rivet is an it depends – it may either be short like you see with the AK-74 or attached via the long rear trunnion rivet. You may want to start with an 1/8″ drill and go up to 5/32″. The rear trunnion if it has a large rear trunnion rivet in it will be 4.5mm and I actually use a 4.5mm cobalt bit on that one to free up the side rail. Some guys who don’t have a 4.5mm bit will use an 11/64″ drill bit instead – it’s 4.366mm. I’ll do another post about trunnions but unless you are running a drill or mill that you know is true to the table and work piece, do not try and drill the rivet out entirely from one side, I go about half way in from each side and punch out the remainder or use an air hammer to chase out the rivet with an 1/8″ drift pin but that’s a topic for another day.
You can see the receiver material that was forced into the center hole. It really shows how secure riveting can be with countersunk rivets and holes.
So, yes, you can drill out the rivets and use the scope mount on other rifles. The question becomes what to do with the source receiver. If it is getting destroyed then this is a non issue – follow whatever your procedures are to file a destroyed receiver/firearm record with the ATF provided it was serialized and registered to begin with unlike rifles built from a blank, etc.
Now if you want to keep the receiver, the recommeendation would give is to put a thick copper backing plate behind the holes, weld them shut and then sand the result flush. For the holes with the cones, if you have any, grind/mill them down flush first and then do the same – copper backing plate, weld the holes shut and then sand flush.
You’ll need to refinish at least the receiver and the bluing on the steel welds typically doesn’t blend with bluing on the receiver so you may want to just refinish the whole thing if you care about it looking good.
Looking at the back of the side rail is fascinating. The whole indexing of the scope rail starts with the front rivet of the rear trunnion. and then having an equal distance from the top of the receiver to the top of the side rail. Now this one is flopped 180 degrees compared to the receiver under it but look at the accomodations they have for thee selector lever and center support pin of the receiver. This is off a WASR-10 and is an AKM style plate but interestingly the rear trunnion was a split AK-74 style with two small short rivets in front on the two legs of the trunnion and a long rear trunnion vs. the ccommon AKM approach of two long rivets securing the rear trunnion. The machining is crude but it did the job. The AK-Builder plates are virtually identical but far better machined and finished. If I needed to use an AKM side rail, that’s what I would get.
Summary
Yeah, you can remove the side rail but if you plan to continue to use the receiver, you’ll need to weld the holes closed, sand, and refinish the weapon. I’m very impressed by the design they came up with – it spreads forces across the sheet metal receiver and allows ready access to the dust cover and internals if required.
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 info@roninsgrips.com. Please note that for links to other websites, I may be paid via an affiliate program such as Avantlink, Impact, Amazon and eBay.
So, let’s review how to remove a riveted AK trigger guard assembly. For those of you building from virgin kits or complete demilled (“demilitarized”) kits, you don’t need to do this but for many folks they do. In my case, I needed to remove the trigger guard from a beat to heck donor rifle that someone had butchered.
You have three options to remove the trigger guard rivets:
Drill them out by center punching each rivet or using a rivet drill jig and remove them.
Mill the heads off, drill a hole and punch out the remainer of the bodies.
Grind the heads off, drill a hole and punch out the remainder
All of the above methods work. It really comes down to what you are most comfortable with. As for myself, I use option three. The reason I just don’t drill them out is that rivet head shapes can vary considerably. The AK-Builder drilling jig is fantastic but it can’t guarantee you are centered on every rivet.
With this in mind, I simply take a 4″ grinder and take off the rivet heads flush to the surface of the trigger guard itself. This lets me see the outline of the rivet bodies so I can then drill and 1/8″ hole and I’ll explain why after a couple of photos.
This is my 4.5″ Ryobi 18 volt grinder. To be honest, the tool pleasantly surprised me. I really wondered how much torque and battery life it would have. Over the last six months I have ground down quite a few bolts and metal parts with this tool. Before I had it, I had a 4″ Makita corded grinder that I still have — it’s just that cordless is so convenient. The Ryobi made short work of the five rivets that hold on the trigger guard.
Definitely practice with your angle grinder until you are able to control it. What you want to do is to remove the rivet head with out doing major damage to the trigger guard. Can you see the outline of the rivet bodies? That is what we want to get all of the way around.
The next steps you will do are to center punch each rivet, drill an 1/8″ hole through the rivet and then use a roll pin punch to knock the rivet out. This was a bit of an epiphany for me one day – I was trying to keep the punch on the rivet and I thought to myself – “Man, what if I drill a hole and use the right sized roll pin punch? The little ball on the end of the roll pin punch ought to keep it centered.” I tried it and it worked great. No more punches slipping around.
At the bottom is an automatic center punch. I love these things. You push down on the handle until the action cycles inside and the hardened tip makes a dimple in the surface without a hammer. Above it is my roll pin punch. Tons of companies make these and you can barely see the little ball at the end that will center the punch on the drill hole. Above it is an 1/8″ drill bit. I’d recommend you go with good cobalt bits when demilling. They last longer and will go through just about anything. Note, if you buy a cheap cobalt drill bit it can be worse than plain high speed steel from a quality manufacturer. Go with a brand name – Norseman is my favorite but you can go with stuff from big box stores too like Bosch, Dewalt, etc. If you are getting a set off Amazon, be sure to check reviews.
Here’s the finished result – a nicely separated receiver, selector stop plate and trigger guard. Be careful not to lose that stop plate – you will need to and the trigger guard for your next build.
One perk of only using an 1/8″ drill bit is that you have some margin for not being exactly centered on the rivet. 1/8″ is 3.127mm and a 5/32″ drill bit comes in at 3.969mm so real close to the actual 4mm holes drilled in the parts and if you are off a tad then you wind up with an “egged” or misshapen holes. Of course you can use other size drill bits – just figure out what you like.
Even though rivets are relatively soft steel, I still recommend you use cutting fluid. I keep some Tap Magic in a little squeeze bottle with a needle tip and it makes it super easy to add it when working.
Summary
Removing the trigger guard is all about getting rid of the five rivets that hold it in place. Whether you drill, sand, mill, grind or otherwise cut off the tops, then drill out the remainder – using a roll pin punch really makes it easy to punch them out the rest of the way.
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 info@roninsgrips.com. Please note that for links to other websites, I may be paid via an affiliate program such as Avantlink, Impact, Amazon and eBay.
