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Page AK-47 » Russian
Posted: 3/14/2006 6:22:47 AM EDT
Has anyone successfully threaded the Vepr muzzle w/o having to turn it down?
Bushmaster has 5/8"-24 .308 muzzle accessories and its the closest match to the Vepr muzzle OD there is. I know the easiest way is to probably just strip the barrel, take it to a machine shop, have the machinist turn down the OD at the muzzle and thread it for 14mm for the standard AK muzzle accessories.
Link Posted: 3/16/2006 5:38:44 PM EDT
I put a phantom supressor on my .308, I turned the threads out and pressed it on. I would have probably gotten away with just threading the barrell. But I didnt want to take a chance since I didnt even cut all of the threads out, I still have a little bit if the threads left in there, I did have to depen the hole. the barrell of the vepr is .75" long past the front site and the supressor was only .7" deep, So to avail an unsightly, and hard to clean, gap. I just cut the hole deeper, theres a couple of pics of it. In the pic thread above, and also at AKFORUM.NET in the VEPR/SAIGA forum. Another advantage is if I really wanted to I could pull the suppressor (I think, It's on there pretty tight) and have the gun in the original configuration....Not that i would want to, but if I did.
Link Posted: 3/17/2006 1:51:48 AM EDT
[Last Edit: 3/17/2006 3:01:08 AM EDT by metroplex]
I measured my 7.62x39 Vepr K muzzle to be about .610"-.615" OD, which is smaller than 5/8.
If you had to turn down the threads on the 5/8" FS, chances are a 5/8" threading just *might* work.
Link Posted: 3/21/2006 4:35:06 PM EDT
no cause .610 is smaller than .675 (5/8) By turning down 5/8 female threads, I actually made the hole bigger.....Dont ask thats just how it worked out. I had to make the hole in the FS bigger to be able to heatpress the Supressor on....A competent smith with a lathe can do this... Our figures showed that the barrell was just too small to thread to 5/8. and if we threaded it to the OD of the barrell, the threads would be to small to give a solid hold between the 2 parts.....I know it doesnt make sense.....But thats how we did it.
Link Posted: 3/21/2006 4:40:06 PM EDT
5/8x24 will work on a VEPR barrel.
Link Posted: 3/22/2006 3:26:31 AM EDT
So is a 5/8-24 RH threading die verified to work on the Vepr's w/ a .615" muzzle OD?

From what you have said, you had to remove the threads from the 5/8-24 suppressor, which means you could have threaded the barrel for 5/8-24 and the suppressor may have fit properly.

5/8-24 dies are a lot more common than 14x1 LH or 15x1 LH. Its just a matter of finding the 5/8-24 TAT for 7.62x39... I really want to put some type of muzzle device on my Vepr so that it can protect the muzzle crown, and be a reminder of the AWB's death.
Link Posted: 3/22/2006 12:16:11 PM EDT

Originally Posted By metroplex:
So is a 5/8-24 RH threading die verified to work on the Vepr's w/ a .615" muzzle OD?



Yes, it works.

Use an AR10 flash hider.
Link Posted: 3/23/2006 11:08:10 AM EDT
PICS PICS PICS I want to see the Vepr with the AR10 flash hider with the threaded barrel. PLEASE!
Link Posted: 3/23/2006 1:25:51 PM EDT
[Last Edit: 3/23/2006 1:42:18 PM EDT by metroplex]
Does the AR-10 use 5/8-24 RH threading or is it LH? Where can I buy the thread alignment tool for the AR-10 or 7.62x39 rifle? I contacted Dyna Systems but they're rather slow in responding.
Link Posted: 3/23/2006 6:07:15 PM EDT
I didnt have to cut ALL of the threads out, there was still some left.....SO NO it will not work. Its confusing due to the way that threads are measured.......You may be able to thread a 9/16 thread pattern which is what the FAL takes I believe. But you CAN NOT thread you VEPR barrell to 5/8..........Unless over 60 years of machining/gunsmithing/gunmaking experience was wrong....But what the hell do I know.....I am only a machinist
Link Posted: 3/23/2006 7:58:43 PM EDT
[Last Edit: 3/23/2006 8:10:27 PM EDT by STG77]
Mark Krebs seems to think it's possible. He managed to do it.

www.krebscustom.com/classIIIcorner.html
Link Posted: 3/24/2006 2:58:51 AM EDT
[Last Edit: 3/24/2006 3:04:12 AM EDT by metroplex]
STG77: Krebs did a lot of custom work on that Vepr. Notice the new rear sight, the front sight, etc... He most likely turned down the barrel and threaded it for 14mm x 1 LH.
Link Posted: 3/24/2006 3:28:31 AM EDT
[Last Edit: 3/24/2006 3:34:52 AM EDT by 762bodydropper]
He may have also used a nut to attatch it....
Let me break it down barney style for you......
1/8 of an inch is equal to .125 inches.....There are 5, 1/8s in 5/8s of an inch....therefore there are 5, .125s .125x5=.675 .675 is bigger than the .612 that the barrell is......No you cant push the attatchment on....But you can make it fit. Not by threading the barell.....like I said I had to cut some of the threads out...not all of them! Meaning that the valleys of the threads are larger than the outside diameter of the barrell....Therefore if you thread the barrell, The peaks of the threads which come from the outside diameter of the barrell will be of a smaller outside diameter than that of the valleys of the threads of the suppressor.....Therefore, It may thread on, but it will be very loose......Therefore will not work. Not saying mark krebs didnt do it...the mans a gunsmithing genious. I give credit where credits due....But dont come on here spouting of about something that you saw on a website and have no idea of how its done. I have personally put a muzzle break on a VEPR...have you? I know what what I had to do. I spoke with one of the top gunsmiths in georgia about it....I had Myself and 2 other machinists with me, Both of which are machine tool and CNC instructors. One of which was a lead machinist at Cobray.....I am gonna take thier word over the word of someone that saw one done on a website and can only say "Yeah, I saw it here" and gave me a link......Gime some hard facts as to why and how it can be done......
Link Posted: 3/24/2006 3:55:48 AM EDT
[Last Edit: 3/24/2006 4:44:51 AM EDT by metroplex]
You're right, the bbl OD will be in the middle between the major and minor diameters of the flash suppressor... no go
Link Posted: 3/24/2006 8:01:05 AM EDT
First, 5/8 is .625, not .675.

Second...I'm not "spouting". I OWN A VEPR THAT MARK KREBS THREADED 5/8X24.
Link Posted: 3/24/2006 9:25:29 AM EDT
Did he do anything else to the barrel or flash suppressor? Or did he simply just thread it for 5/8-24 as-is and use an AR-10 flash suppressor?
Link Posted: 3/24/2006 12:11:06 PM EDT

Originally Posted By STG77:
First, 5/8 is .625, not .675.

Second...I'm not "spouting". I OWN A VEPR THAT MARK KREBS THREADED 5/8X24.


Ok you got me on that, I had just woke up....However if my math is right, .625 is still gonna be bigger that .612.....
Link Posted: 3/24/2006 12:27:04 PM EDT

Originally Posted By 762bodydropper:

Originally Posted By STG77:
First, 5/8 is .625, not .675.

Second...I'm not "spouting". I OWN A VEPR THAT MARK KREBS THREADED 5/8X24.


Ok you got me on that, I had just woke up....However if my math is right, .625 is still gonna be bigger that .612.....



My machinist handbook recommends using a bar/stock of 0.002"-0.005" undersized from the nominal size of the die. We're at about 0.010"-0.015" undersized, but I've seen another reference to someone using an AR-10 flash hider on a Krebs KTR-03V.
Link Posted: 3/24/2006 12:53:28 PM EDT

Originally Posted By metroplex:
Did he do anything else to the barrel or flash suppressor? Or did he simply just thread it for 5/8-24 as-is and use an AR-10 flash suppressor?




Not that I know of. It's loctited on, since there is no plunger assy holding it, so I don't really want to remove it.


I don't have a machinist's handbook handy, but if you look up the specs for class 2a 5/8x24 threads, I'm sure you'll find that .610 is thick enough.
Link Posted: 3/24/2006 1:04:46 PM EDT
[Last Edit: 3/25/2006 4:07:42 AM EDT by metroplex]
Krebs said they use 1/2 x 28 for their muzzles and use A2 flash suppressors.
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