Tag Archives: M77

AK & Related Rifles, Serbia

Adding a RS Regulate GKR-9DY Handguard To A Zastava M77

Ok, so I planned to completely redo the M77 and keep the Battleworn wood for the future just in case. The first step was to swap out the wood handguards for a RS Regulate GKR-9DY. It’s a 9″ MLOK rail for Zastava AK-type rifles – this matters because a Zastava handguard is longer and a different shape than an AKM handguard.

Scot Hoskinson owns RS Regulate and is a meticulous engineer. His products are top notch and one thing I would tell you is to always read the instructions. He puts a lot of effort into documenting what you need to do so find the instructions and follow them.

Trust me – read and follow the instructions to install a RS Regulate handguard. Note the instruction sheet is for the old part number GKR-9Y. Scot revised the part number and it is now the GKR-9DY — same handguard but different part number.
Per the instructions in steps 3 and 4, I tapped the end cap into place. Note, you do need to test fit and make sure it will fit. You aren’t beating it into place with a ton of force. Mine went in without any filing needed but I did need to tap it to get it fully seated. You want the end cap to sit in the receiver firmly – not loose.

I don’t have photos of every step Scot lists, but I do want to mention step 5 – the front retainer set screws are backed out towards the receiver with the allen heads facing the rear. Once you have the front retainer in place and screwed to the handguard in step 10, you then tighten down the set screws to make everything nice and tight.

In all of his steps, be sure to follow the torque specifications and use blue loc-tite or your favorite medium strength thread locker. If you don’t, then the screws will risk coming loose and potentially falling out.
You can see the rifle’s handguard retainer is locked in place because the cam lever is rotated backwards. Looking down past the barrel you can see one of the two front retainer set screws waiting to be snugged down.
I used a long Bondhaus ball head allen key to reach in and tighten the set screws. Let me spare you some future grief – buy quality sets of allen wrenches that properly engage your fasteners. The cheap import keys are prone to poor fitment and/or rounding over the edges and both will mess up your fasteners.
I applied Blue Loc-Tite before I snugged down the set screws. I removed the residue with a shop towel.

The Gas Tube Cover

The RS Regulate handguards are the lower-half only. It’s up to you to decide if you want to run the wood or just what. In my case, I am using one of our Yugo/Zastava gas tube covers that is made from glass-fiber reinforced high-temp urethane. A Yugo gas tube cover is significantly longer than that of an AKM and are not interchangeable.

To remove it, rotate the locking lever on the rear sight base. Zastava is one of the makers that make that lever really tight. I use a large adjustable wrench’s jaws to hold the lever while I rotate it up. You can also use a hammer with plastic heads to tap the lever up. Once it is rotated, the rear of the tube closer to the receiver can be lifted up and the unit brought back just a tad to clear the front gas block. By the way, the bolt carrier must be removed or the long gas piston will be in the tube and block removal.

I didn’t get a picture of the gas tube with the wood before I removed it so we’ll just pick up here. This is one of our high-temp Yugo/Zastava gas tube covers. The spring clip is from the wood set and pops into the our cover to help provide tension and support. If you don’t have the clip, I would recommend buying one vs. skipping it. Check Apex Gun Parts, Robert RTG, Numrich, Centerfire, etc.
The spring clip just presses into the pocket molded foir it in the cover.
I like to use a vise to hold the forged end of the gas tube. DO NOT try and clamp the thing circular end or you will crush it. The vise you see has smooth jaws and will not hurt the forging – if your vise has aggressive jaws to hold material, use something to protect the gas tube like jaw covers, pieces of wood, etc. In this photo, the cover is fully rotated into position. You may find it easier to rotate your cover to the left or to the right when it comes to installation or removal. If it will not turn, carefully inspect why and remove a bit of material as needed with a file, Don’t rush – you want a firm fit and for it to look good.
What it looks like when done.

Years ago, I did do a blog post with more instructions and links to videos. Please click here if you want to read it.

End Result

Summary

RS Regulate makes some great lower handguards for a variety of AKs including for the Yugo/Zastava M70 and M77s. It takes a little bit of effort to install and is very much worth it. You can optionally use your wood gas tube cover or buy one of our polymer units.

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.

AK & Related Rifles, Serbia

The Century Zastava PAP M77 in .308 – With Battleworn Furniture

Years ago, I had a Zastava M77 and regretfully sold it back in 2014. It was one of those situations where I had to sell it to fund other projects but I didn’t even get a chance to shoot it. I also had a custom M76 (the 8mm version) for a while but I did sell that one – mainly because it was a primer popper. That is a known issue because the firing pin hole opened up out of spec due to corrosive ammo use and didn’t adequately support the primer as a result but I digress.

I had resisted buying another one until Zastava decided to release what they called the “Battleworn” model (ZR77308W) and I caved. On one hand, it comes with some really nice retro looking Europen beech wood furniture. What really got me was that it was way cheaper than their other models that had optics and/or polymer furniture at that time.

Why the M77?

So, I had wanted to get back into the Zastava designated marksman’s rifle (DMR) game for a while and was just biding my time. The reason I wanted the M77 was due to all of the quality match 7.62×51 and match .308 match ammo that is out there. In comparison, try finding affordable true match grade 8mm ammo for the M76 or match 7.62x54r for the M91. You can find it once in a while but it’s not cheap and choices are limited here in the US. On the other hand, match 7.62×51 and .308 plentiful and affordable.

So, the main reasons were the ammo and the second was the M77 Battleworn model being very affordable in the Late Summer of 2023. As I am writing this, a quick search on GunBroker shows the Battleworn model selling fro $1369 with one 20-rd magazine up to $1,499 with five 20 round mags plus the various models are a lot closer in price. I paid less last summer but you get the idea. (In 2014 I bought a M77 with a thumbhole polymer stock and polymer handguard set for $600 or 700 from Centerfire Systems but that’s the way pricing goes – any vendor will raise prices to what they think the market will bear to try and maximize profits.)

Taking a Closer Look

It’s well packed in an egg foam box. Note the CSSpecs 25 round magazine on the box cover.
Honestly, the wood is really nice. It’s very reminiscent pf the M76 wood with a few minor exceptions – the grip does not have a ferrule, the recoil pad uses allen head screws and the stock bolt is one of their modern commerical shorter ones vs. the long Yugo military 8x1x260mm (about 10.23″ long).
Like many aspects of the original designs, the Yugoslavs modfield their scope rails and how they mount The result is more to the rear and is often refered to as “rear-biased” so they need a scope mount vs. an AKM pattern rail.
Honestly, the wood is cool. It has almost rough hewn look but better finished if that makes sense. The grip reminds me of one that Matt Shuster of Ironwood Designs came up with many years ago before he passed. I think he called it the “mini fat cap” – if someone remembers, please tell me. He made the M76 Fat cap patterned after the original wierd awkward really fat but oddly short M76 grip but without a ferrule. Then he came up with a far more elegant smaller one and this Zastava design reminds me of it. Folks, Matt helped me get started years ago and was a genius with wood. God rest his soul and take care of his family.
It has the mile long 19.7″ cold hammer forged barrel. The silver disc on the gas tube is the three position gas regulator. It has a slant brake on it and 14x1mm left hand threads under it just like any other AK. A M76’s long flash hider is actually part of the front sight assembly but that is not the case with the M77 – you can install whatever you want. Also, note the cleaning rod.
Here’s a view of the rifle looking at the operating side. The chromed bolt jumps right out in contrast.
The M77 uses a bulged trunnion and the oversized AK receiver needs to accomadte it. These bigger 1.5mm thick receivers are beefy. They both hold the various component assemblies in position and the thicker receiver means more steel to compensate for any metalurgical or hardening shortcomings.
Zooming in on just the receiver. Note the notched selector/safety lever and the relatively tall selector stop. In the top right you can see the other side of the operating rod lock.

Opening it up

The locking dust cover was introduced in the M70 Yugo rifles because their doctrine made extensive use of rifle grenades. They didn’t want the cover top pop off so they added a sliding lock that holds the rear recoild spring assembly in place and, thus, the top cover in place. By the way, one of the really nice side benefits is that when you reassemble a rifle with one of these locks, you put the recol spring in front, install the dust cover without fighting the spring, push the button and the recoil rod pops out the back.
Looking at the locking assembl, the plunger button the operator pushes is at the bottom of the photo. The slightly elevated portion under the top lip of the trunnion (top in this photo – right side in real life looking down – is what slides out of the way wehn pressed so the recoil spring assembly can come forward for removal. What you don’t see is the hidden compression spring. If you ever need these parts, CNC Warrior make and sells both the whole assembly.
Looking down at the classic double hook AK trigger and double wound spring. I’ve had guys ask me why did they double these? The answer is fault tolerance. The second hook is there if the first should fail and the second spring winding is there should one of the two fail. In all of my years working on civilian AKs, I’ve never seen a hook fail but I have seen springs fail although very, very rare and usually from a surplus kit build.
Look at those hooks! They are forged and not stamped. The bevels in the front and the back help the bolt carrier pass by.
Here’s a better view of the three position gas regulator disc. Note the vent holes in the gas block itself.
One oversized bolt assembly. Despite what some may tell you, the PSLs and these M76/M77/M91 families of rifles are oversized AKs. The SVD Dragunovs use very different bolt carrier assemblies.
Longer than a normal AK gas pistol and chrome plated to improve corrosion resistance.
View from the side. Some of the machining is crude but effective in places.
Bolt extended in the carrier.
I chuckled when I saw this. There are two numbering systems on some of the parts – crisp machined ones and ones done by hand with an electropencil like you would see on some kits.
You an see the numbers of the key parts and they should all match.
Interesting – more holes to vent propellant gasses.
A better view of the upper and lower handguard assembly,
A view of the grip.
The buttstock has the distinctive grip area like you would see on the M76 military stocks. I have never had the purpose of that grip area explained to me.
It uses a classic Yugo military sized recoil pad. What’s noteworthy is that they have ditched the old slotted screws for allen/head-head screws.

Summary

This gives you an overview of the M77 battleworn model right out of the box. Nothing really surprised me and the quality looked good. Sometimes I buy stuff and regret it but not this time.

If you know me, you also know I could not going to leave it alone and the customizations will be in future posts.

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.

Uncategorized

Joseph’s Sweet M77 With Our Bulgy Grip

Joseph’s Zastava M77 looks sweet!  I really like how it turned out!!

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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.

Gunsmithing

What is a Ferrule on Yugo and AK Rifles?

A ferrule is a metal end cap found on some wood grips and handguards to protect the end grain of the wood from being hammered and splitting open.  They were used on different country’s weapons and are usually not interchangeable between countries.  For example, Bulgarian and Yugo ferrules are different.

Near and dear to me are the metal ferrules on Yugoslav / Zastava wood lower handguards.  The following photo shows a M92 lower and the black metal cap is the ferrule.  This ferrule does not fit everything Yugo – just the M70, M85/92, and M77.  The M72 and M76 are unique sizes.

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You have three options when you need a ferrule:  1) Find a used one and this is real hard – try posting in the Marketplace of http://www.akfiles.com and see if they have one.  2) Buy a replica ferrule from us or 3) Simply pry the old ferrule off, put it on the new handguard and the squeeze the tabs shut again with a pair of pliers.

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Note if you are putting it on one of our plastic handguards either just set it on it with the ears closed or glue it in place.  Absolutely do not try to squeeze the ears shut — the little metal divots will not dig into our plastic and you risk snapping the handguard tabs.  Again, either slide it on or glue it in place with something like rubber glue or Goop that you can later remove if you want.  Epoxy works too but it is pretty permanent.

For example, I just slid the ferrule on the M70 bulged handguard in the next photo.

We manufacture ferrules that fit the Yugo/Zastava M70, M77, M85 and M92 lower handguards. Note, they are specific to those models and will not fit other nationalities or models.

Click here to visit our store with the ferrules for sale.

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.

AK & Related Rifles, Gunsmithing

Added RS Regulate Mount and Vortex HS-T Scope to the Zastava M77

I installed the RS!Regulate AK-310 base and AKR top rail in preparation for the new beautiful Vortex HS-T 4-16x44mm scope the folks at Vortex helped me select.

The RS!Regulate system is genuinely impressive. By installing the bottom rail, you then have options about the front to back location of the AKR rail as well as left to right. If you wanted to, you could install a shim if you needed even more vertical adjustment on one end or the other to compensate for a poorly placed side mount on the rifle.

The only hangup installing the AR-310 base was a poorly formed rivet with a protruding portion of the head that the base was hanging up on. I ground that portion flush and then used Brownells’ Oxpho blue to touch it up. When steel is freshly ground, I apply the Oxpho cold bluing liquid with a Q-tip and the steel instantly turns black. I let it sit for about 30 seconds and then wipe it off and apply oil.

The AK-310 base slides on like any other ComBlock side mount but it has a very nice cam lever and an adjustable bolt on the bottom to get the cam lever nice and secure. Once I got rid of the protruding rivet, it slid right on and then I adjusted to bolt until it was nice and snug when I flipped the lever.

The AKR looks like a reverse picatinny rail on the bottom and interlocks with the rail top of the AK-310. I had to move the AKR all the way to the front to compensate for the M77’s rear mounted rail. The AKR is held to the AK-310 by 4 screws in grooves. The beauty of this is that you can really dial in the centering of the scope. I was able to get the AKR exactly centered over the M77. Now, once you have it located, they give you two staking pins to drill and install to permanently locate AKR. I have held off doing that I may need to move it around some but went ahead and applied blue Loc-tite on the screws.

With the rail centered and ready to go, I turned my attention to the HS-T scope from Vortex. This is one heck of a nice scope. I opted for the MilDot reticle and a 44mm objective to ensure I cleared the rear sight leaf. In hindsight, I could have gone with a 50mm objective as there was plenty of clearance.  I own a Vortex Sparc II red dot and liked it.  This is my first actual Vortex rifle scope and I am very impressed.

I used 30mm medium rings to mount the Vortex. They are extremely beefy tactical rings from UTG. You may laugh but I have had very good luck with their rings. The only shortcoming this time is that they were so long (from front to back) that I ate up some precious real estate for sliding the scope forward. It all worked out in the end but for awhile I wasn’t sure if I could get the eye relief right but I did.

There was some give and take as I moved the scope rings and the AKR around. The photo above shows the AKR sitting in the last groove.  I wound up actually having it overhang by one by the time it was all set.

So, the scope lines up beautifully with the 1″ cheek riser on my Ace skeleton stock. I have heard that the Vortex scopes have good optics but that is an understatement – you have to look through one to realize how good it is – very bright and clear. Couple that with arguably one of the best no questions asked warranties in the industry and now you know why I bought it. I did a ton of research before doing so as well.

Now, the Yugo M77 is complete. It has our traditional front handguard set plus our custom Bulgy ARM-9 grip that I really like.

Only one more thing to do now … find the time to take this hammer shooting with multiple brands and loads of good ammo to stretch its legs.

In the very near future, I will swap out the medium rings for a low offset AR mount so I can get the scope closer to the center of the bore plus move the scope just a bit more forward and that will be a post for another day.

One final comment, Ace Riflestocks emailed me the other day and their modular Zastava adapter is back in stock.  If you are looking for one, I would recommend checking them out as well as Desert Fox.

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.

AK & Related Rifles, Gunsmithing, Serbia

Converted a Base Zastava M77 .308 DMR

I purchased a base Zastava M77 rifle from Bud’s Guns and had the rifle sent to my good friend and FFL, Scott Igert over at http://www.migunexchange.com. To be imported, the rifle was pretty neutered with a thumbhole stock and a tacked on muzzle nut.  We then went to work – the result has our M70 traditional handguard set (the same handguard style is used on the M70 series, M76 and M77 rifles), one of our Bulgy ARM-9 custom grips (my favorite grip hands down right now), Tapco G2 FCG, US Phantom brake, a Desert Fox PK1025 adapter, and an Ace skeleton stock with a 1″ pad.

The original muzzle nut was tack welded on. I removed it with a Dremel and touched up with Oxypho Blue from Brownells.

The original gas tube cover did not use a handguard retainer spring/clip. My gas tube covers really need them to stabilize so I dug around in my parts bin and used one.

The Phantom brake is one I had handy and rather than bother with the detent pin, I used a crush washer.

The FCG retaining wire self destructed as I pulled it out (I hate those things) and replaced it with a plate.  [We have a new fire control retaining plate that is the proper dimensions for all AKM style fire control groups.]

The fixed stock was secured via a long wood screw that went though the integral Yugo grip nut. I was impressed that they did this without harming the 6mm threads in the nut. I just used one of our full length screws and away I went.

Our next post will show the RS Regulate mount and Vortex scope we bought for the rifle.

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.