Tag Archives: CNC Warrior

Installing the CNC Warrior Picatinny Rail Scope Mount for the M92 PAP Pistol

Another great accessory for the Yugo M92 or M85 PAP is the slick picatinny rail kit that CNC Warrior sells.  This thing is a breeze to install and is the best means I have seen for adding an optic to the M92. Because the screws are inserted from the rail side, it is superior to other products that require the screws to come in from underneath the dust cover and risk being hit by the bolt carrier.

All you need is the pistol, a drill and some cutting oil to do the installation.

SAFETY STEP – MAKE SURE THE WEAPON IS UNLOADED.  NEVER ASSUME THAT IT IS – VERIFY IT IS UNLOADED BEFORE YOU BEGIN WORK.

1.  This is the top thick hinge of the M85/M92 dust cover.  See the faint circles?  Those are the spot welds and they are very hard!  Do not drill into them!  The new CNC Warrior mount has four holes and you only need to use two of them.  The reason there is four is so you can pick the best two that get you around/away from the spot welds.  Please note that my rail is only silver because it was a brand new design and they hadn’t applied a finish yet.  If you order one, you will get a black rail!

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2.  Here you can see my fancy high tech tools.  My Ryobi drill, Tap Magic cutting oil to lubricate the drills and the taps.  Note, you will need to buy a tap handle if you do not have one.  Do not take the short cut of trying to start the tap with a regular socket or open end wrench.  You really want the tap to be firmly held so you can tap the threads at a right angle to the surface of the hinge.  Also, see that little black cylinder?  That is a drill guide that you put into the hole you select to guide the drill bit to the right place on the hinge.  Be sure to use the cutting oil!

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3.  As an aside, I blasted the mount and then sprayed on flat black Molyresin and baked it.  You’d never know it came to me unfinished.

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4.  After you clean up the chips and are ready to do the final screwing of the mount, be sure to apply Blue Loctite so it does not come loose.

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That’s it!  The mount is solid and it holds my Vortex Sparc red dot just great.  Note our quick takedown pin to make it easy to remove the cover and get the optic out of the way.

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Ronin’s Grips Quick Takedown pin for the M92 dust cover


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Additional Images:

Vortex Optics Sparc AR Red Dotx 40mm


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List Price: $199.00 USD
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Installing the CNC Warrior M92 Folding Arm Brace – So Sweet!!!!!!

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Next up on the agenda was to install the CNC Warrior folding M92 arm brace.  This thing is wickedly well done and if you get it plus the optional installation kit, just about anyone comfortable with using a drill can do it.

The following is a quick photo of the installation kit – you will need a hand drill and some cutting oil – I like Tap Magic but just about any oil will do vs. running dry and overheating stuff.  You do not want to work harden the sheet metal of the receiver — use cutting oil and keep it cool!

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SAFETY STEP – MAKE SURE THE WEAPON IS UNLOADED.  NEVER ASSUME THAT IT IS – VERIFY IT IS UNLOADED BEFORE YOU BEGIN WORK.

1.  Make sure your weapon is securely mounted and that you can have ready access to the rear.  The PAP buttstock drill kit has this handy little jig block to help you locate where to drill the small starter hole.

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2.  With the jig in place, put in some cutting oil and drill the hole.  Note, I am just using a plain Ryobi 18volt hand drill.  The big bit is 3/8″ and I think 12 volt or better could do the job.  The small hole will help you locate and drill with the bigger 3/8″ bit.

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3.  Be sure to read the instructions and the caution to go real slow with the 3/8″ bit because if you try to go fast, your bit is apt to grab and thread straight into the receiver.  If this happens then you can’t drill the hole as the bit is grabbed and goes in like a powered screw with a boatload of torque.  Now, I did make this mistake but I knew how to get out – I grabbed a 3/8″ cobalt end mill, checked it in my drill and cut the big offending tabs right out of the hole.  If you run into this, you would need to either get an end mill bit or try using various Dremel bits to remove what is helf.

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4.  My next steps were to use a deburring tool to make sure I didn’t leave anything nasty and sharp in the hole waiting to cut me!  I also vacuumed out the inside of the pistol and made sure it was clean.

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5.  The folder is connected to the receiver via a threaded block that is inserted into the receiver and you then thread the large allen screw into it.  Be sure to line things up and apply Blue Loctite so it will not come loose over time.

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That’s all there was to it!!  This is a very well done piece of gear guys.  The folder mechanism is solid and the brace feels great either on the shoulder or on the arm plus you can fold it out the way.  Note the quick release sling swivel.  I used one of my Troy swivels – the folder has the hole to use one but it is up to you as to whether you want one or not.

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One last comment – I am keeping the printed copy of the ATF approval letter (that comes with the brace) in my case with the M92 to show anyone who asks that the brace is not a buttstock and this the M92 is not a SBR.  You might want to do the same.

By the way, for any of you wondering why I am using all these CNC Warrior parts on this build – the answer is simple – they make really good stuff and this is my personal M92.  I only want solid reliable stuff on it.


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Removing the M92 PAP Muzzle Cap and Installing the Detent Pin

The M92 PAP pistol is brought in neutered with a muzzle cap and no detent spring.  With some careful Dremel work, some cold blue solution and a bit of patience, it is really easy to restore the pistol back to it’s original threaded muzzle state

SAFETY STEP – MAKE SURE THE WEAPON IS UNLOADED.  NEVER ASSUME THAT IT IS – VERIFY IT IS UNLOADED BEFORE YOU BEGIN WORK.

1.  Look at the muzzle of the PAP
M92 and you will see a big spot weld that is holding the muzzle cover on.  Thankfully it is both small and superficial so it can be cut through.

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2.  Now the first step is to secure the pistol so it can’t move around.  I used a wood jawed woodworking vice but you can use whatever you have handy.  If you use a regular vise, be sure to put something over the jaws to protect your M92 from getting all scratched up.

 

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3.  I use my Dremel tool all the time.  These days I am using one of their cordless jobs with two Lithium batteries and I like the EZ Lock bits that make replacing cutting wheels and other tasks a breeze.  Be sure to practice with your Dremel before doing this.  Please don’t go buy a Dremel and try and do this fresh out of the box.  The secret is to make light cuts and not rush.  Let the weight of the tool do the work and carefully guide it and keep it in position.

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4.  Now, I came in from the front and at a slight angle to protect the front sight & gas block combo.  The cap will twist off clock-wise as it is reverse threaded.  Cut a bit and test, cut a bit and test over and over.  If you have a strap wrench or a pipe wrench, that can help with the removal.  Again, remember that this is reverse threaded just like other AKs.  It will loosen by turning clockwise.

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5.  Hidden under that large ugly cap is the big 26 x 1.5mm LH (reverse threaded) muzzle just waiting to have your favorite brake or fake can installed but it would be real cool to get the detent pin working again – wouldn’t it?

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5.  Use a small sanding drum and smooth the block where the weld was and then use the cold bluing solution you like to color the steel while it is fresh and oil free.  I like Brownell’s Oxpho Blue and apply it with a Q-Tip per their instructions.

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6.  CNC Warrior sells a very small kit with the detent pin, spring and cross pin.  The PAP has all the holes there already.  You literally slide in the pin and spring, turn it the right way and then drive in the cross pin, which is a small roll pin.

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7.  I really like the Bulgarian 4 piece Krink brakes and CNC Warrior has great version they have made for the M92.  I pretty much knew I had to go with this brake!  It does a great job reducing muzzle flash and is real high quality.  Now that the detent pin was installed, I just threaded it on until it was where I wanted it and the detent pin engaged fully.

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So that’s all it took!  I hope this helps you with your project.

Stay tuned for more blog posts about the M92.


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Dremel 8220-1/28 Rotary Tool with 160-Piece All-Purpose Accessory Kit


Features: Compact size and weight allows access into tighter areas and reduces user fatigue, This product is made of high quality material, Can be used with all Dremel accessories and attachments, Comes with reuseable storage case and 160 accessories, Can stand upright or hang on a wall by hook, Ideal for cutting, sanding, polishing, grinding, and carving

New From: $110.13 USD In Stock
Used from: Out of Stock

Tools That Can Help You Do the M92 Upgrades

In doing this M92, I wanted to use tools that many guys already have or can get without spending a fortune.  I could have used my mill or drill press but I wanted you to see that some simple hand tools are all you need.  The follow are what I used and certainly you can use other tools that work for you.

Dremel Tool with cutoff wheel, abrasive wheel and sanding drum
If you do much gun work, you’ll find a rotary tool to be a huge time saver when used properly.  I have an ancient corded Dremel tool made for Sears plus an 18volt cordless that I use all the time.  You will need some thin cut off wheels for metal, a small abrasive wheel (if you want or do it all with the sanding drum) and a sanding drum.  Because I use my Dremel a lot, I buy the discounted multibit packs when I find them.

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Here are the tools at Amazon:

Dremel 8220-1/28 12-Volt Max Cordless Rotary Tool

 

One thing I would recommend against is buying cheap no-name import bits – they often fall apart or dull real fast.  For the last few years, I have been buying Dremel brand bits off Amazon.  Everything you’ll need is in the below accessory pack:

 

Dremel 710-05 160 Piece Accessory Kit

The one thing I will say here is to practice before you try to actually work on your new pistol.  I can’t stress this enough – please practice first!! A Dremel can scoot around and chew things up if your hands aren’t supported and you don’t know the “feel” of how to cut things.  So please be sure to do some testing and practice before you go near your pistol.  I’ve been using a Dremel for almost 30 years (literally) and I still get surprised from time to time but I know what to do to minimize bad things from resulting due to my experience.

Hand Drill
You just need a plain jane hand drill.  It could be corded or cordless.  Slower is better to avoid heat build up.  You will need to drill a 3/8″ hole for the arm brace and a #21 hole for the picatinny rail screws.  All the work I did was done with my Ryobi 1/2″ 18volt hand drill that I bought from Home Depot and have gotten a ton of use from over the years.

Tap Handle
If you do not have one already, go get a tap handle from your local hardware store.  You will need it to get a good square grip on the #10 tap if you install the CNC Warrior picatinny rail.  Some guys try to go cheap and use a small wrench but the problem is that you will have a very hard time starting the threading squarely.  Spend a few bucks and get a tap handle.

Irwin 12001 T-Handle 1/4-Inch Capacity Tap Wrench

Good Vise
It really pays to have a good vise.  There are so many options out there but make sure it is secure and that if it has steel jaws, that they are padded with leather, wood, plastic or something else that is relatively soft to protect the finish.  It could be a tool vise or even one of the rifle cleaning and maintenance vises such as Tipton’s.  Just make sure that whatever you use is firmly holding the rifle and can’t slide as you drill.   You could drill it into your work bench or use some clamps on the corners.

Tipton Best Gun Vise

I specifically used one of my woodworking vises that is permanently attached to my work bench for this project.  It is like the following and you must add wood to make the actual jaws hence the screw holes in the side plates of the vise:

IRWIN 226361 6-1/2-Inch Woodworkers Vise

Roll Pin Punches
You could use any punch set but I like pin punches as they have a dimple in the face that goes into the roll spring to help center and drive it.  Note, I have watched guys skip using a punch and just tap in the roll pin with a small hammer directly.  The roll pin punches help but are not mandatory.

Grip 9 pc Roll Pin Punch Set

Hammer

I’ll skip the photo 🙂  You just need something to tap the pin punch with.

Cutting Oil

In a pinch you can use regular oil but I like to use Tap Magic for lubricating drill buts and also taps.  This helps them run cooler and last longer

Forney 20857 Cutting Fluid, Industrial Pro Tap Magic, 4-Ounces

 

Cold Blue Solution and QTips

My favorite cold blue is Oxpho Blue liquid from Brownell’s.  There are a lot of other brands out there and guys have told me they like the cold blue solution from Birchwood Casey as well.

Birchwood Casey PSP Gun Blue (3 Ounce)

 

Deburring tool or Sandpaper

The last tool I would recommend is a deburring tool.  It is very handy for clearing drilled holes of burs.  I used it after I drilled the rear of the receiver for example.

SHAVIV 151-29249 Bonus Pack Deburring Tool Kit for Extra Close Work  with Mango IIB Handle (11 Pieces)

The next posts will be about doing the actual work – I promise 🙂

CNC Warrior’s M92 PAP Picatinny Rail Mount is Excellent!

A M92 is screaming for an optic of some type.  My preference is a red dot and I run a Primary Arms M4 clone on my first rifle and will use a Vortex Sparc on this new rifle.

As some of you may know, I have a Stormwerkz rail on my first M92 that I custom built and it has served me well.  The only draw back with the design is that you install the button head screws from inside the dustcover.  Because of this, you will notice the bolt carrier does hit screws.  I have shot a ton of ammo – well over a thousand rounds – from this rifle and the bolt carrier shows no harm but you do see the scuffed screws.

When I heard that CNC Warrior had a mount, I had to take a closer look and sure enough, they had a different approach.  Their screws go through the rail and screw into the thick steel portion of the dust cover that runs to the hinge.

I talked to Denny, the owner of CNC Warrior, about my plans and he recently switched over to a four hole model that will give a person more options when installing the rail to work around the very hard spot welds — basically you just need two screws so with four holes, you pick the two you like that enable you to miss the welds.

If you look closely at the next photo, you will notice small circular indents in the steel – those are the spot welds that are harder than the surrounding steel and can be an absolute bear to drill through.  Thus, with CNC Warrior’s new four hole rail, you can slide it back and forth until you get two holes that clear these welds.
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Please note that Denny sent me one of each – the old two hole rail and the new four hole rail – so I could show you folks the difference and he did not have time to have it finished so it is bare metal in the photos.  I used Molyresin to finish it flat black but that is not something you will need to worry about.  Going forward, when you order his mount you’ll get the four hole rail section already finished black.

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Included with the picatinny rail is their installation kit and instructions that makes installing it a breeze.  In a future blog post I’ll show you just how easy installation is and how you can do it with a hand drill and some cutting oil.

The rail is on their website at:  http://www.cncwarrior.com/ProductDetails.asp?ProductCode=26454

CNC Warrior Folding Arm Brace for Zastava M92 PAP

One of the parts I knew I wanted was the folding arm brace from CNC Warrior.  This essentially gives you additional support to either fire the pistol with one hand or to even shoulder the weapon comfortably if so desired.

Now the ATF has reviewed and approved the arm brace as not being a shoulder stock.  Each arm brace that CNC Warrior ships includes a copy of the ATF letter that says it is not a stock and that attaching it will not make a pistol a SBR.

This stock is a joint design effort between Chris Bonesteel, of Bonesteel Arms and CNC Warrior and is very nicely made.  It has a very strong hinge mechanism and is a breeze to install.

When I took the assembly out of the box I immediately noticed how well made it was.  I recalled a talk I had several years back with Chris where he worried about some folders being weak and this design reflects that both he and Denny at CNC Warrior wanted to make a strong one.  The attention to detail and fitment are very apparent.  Hands down, this is my favorite set up that I have seen for the M92.

The following are photos of the brace for people who like to see details:

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The following photos shows how nice brace marries up to the back of the receiver plus the quick release sling hole but it has not been attached yet.

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It comes with the mounting screw you will need and easy to follow instructions:

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I highly recommend you buy their installation kit.  It comes with the drill bit and mounting jig to make this a breeze:

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In a later blog post, I’ll show you just how easy the installation was. I kid you not, if you have a hand drill and their installation kit, you can do this!!

 


If you find this post useful, please either buy something using one of the links to eBay and Amazon or click one of the AdNow advertisements.  EBay and Amazon you need to buy something, AdNow pays for each link you visit – no purchase needed.  Doing so will help us fund continued development of the blog.