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Old 01-11-2017, 03:55 AM   #1
VforVandetta
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Default 24X1.5mm FSB for Vepr 7.62x39??

So my buddy is getting a 23" VEPR x39 rifle with an unthreaded muzzle.

I did a little research and am finding that VEPR barrels have a larger diameter and cannot accept a standard AK-74 FSB...is this correct?

Does a FSB exist that will fit a Vepr Barrel and accept 24x1.5mm brakes/comps? Or am I stuck threading the barrel/having a smith do it?

Thanks.

-V
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Old 01-11-2017, 04:07 AM   #2
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If you get a 'smith involved, why couldn't you get him to turn the end of the barrel down so an AK74 FSB would fit?
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Old 01-11-2017, 05:47 AM   #3
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I certainly could. My thought was:

Skip the smith if I can find a compatible block because I am definitely confident in pulling the OEM and installing a FSB myself. At that point I'm saving drive time(smiths live an hour away), a possible lengthy wait depending on their backlog, and the cost of the block might cancel out with the cost of labor.

I'm less confident with threading a barrel because I have never done that and seen examples of fuck ups, and it requires buying tools.

Your suggestion does make sense though, if what I'm asking for doesn't exist.

-V
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Old 01-11-2017, 01:21 PM   #4
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I would just thread it for 14x1 LH and use an 14x1 LH to 24mm x 1.5mm adapter. To me that's easier than pulling the FSB and turning down the barrel. It would take all of ten minutes to do it carefully. If you screw it up, you can still pull the FSB and turn the barrel down and hide it with a 24mm 74 FSB and brake.
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Old 01-11-2017, 02:28 PM   #5
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My brother has this rifle, the barrel is too thick to thread 14x1. You would have to rent/buy a tool to reduce the diameter. We threaded it 15-1 and used a trimmed hk flash hider.
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Old 01-11-2017, 04:26 PM   #6
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I didn't realize that the barrels were too thick to thread 14x1 LH because my VEPR .308 is threaded for 14x1 LH...How much over are we talking?
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Old 01-11-2017, 08:46 PM   #7
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We measured it at .610 ~.611 at the muzzle, just outside the range for a 14-1 die.
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Old 01-11-2017, 09:12 PM   #8
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Is that too thick for an annular grinder to grind down for a 14-1? There is a forum member here that rents tools just for this purpose.
http://www.akfiles.com/forums/showth...ht=tool+rental
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Old 01-12-2017, 01:25 AM   #9
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Yea, thats interesting because I have seen factory molot brakes marked 14x1LH specifically for .308 and 54r...

https://4range.com/product/molot-svd...sor-15683.html

Ive read elsewhere that the Vepr .308 and x39 are the same diameter....

at this point I would like to try to thread it and get a long Tabuk/SVD brake on there which is what I was leaning towards from the beginning and now my buddy is coming around.

I gotta figure out if I can 14x1 this thing or even if I have to do 15x1 we can use a CNC warrior 15x1 to 14x1 adapter. I think it will still look pretty sweet even with an adapter.

appreciate the input so far, hope I can get a definitive answer on this.

-V
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Old 01-12-2017, 08:19 AM   #10
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Quote:
Originally Posted by VforVandetta View Post
Yea, thats interesting because I have seen factory molot brakes marked 14x1LH specifically for .308 and 54r...

https://4range.com/product/molot-svd...sor-15683.html

Ive read elsewhere that the Vepr .308 and x39 are the same diameter....

at this point I would like to try to thread it and get a long Tabuk/SVD brake on there which is what I was leaning towards from the beginning and now my buddy is coming around.

I gotta figure out if I can 14x1 this thing or even if I have to do 15x1 we can use a CNC warrior 15x1 to 14x1 adapter. I think it will still look pretty sweet even with an adapter.

appreciate the input so far, hope I can get a definitive answer on this.

-V

All those versions of the vepr are threaded at the factory on a lathe. If you pay a smith, you could thread it whatever pattern you like.

All I was getting at is your project requires one more step, the annular cutter, before you could use a 14-1 lh die and tat. You just have to weigh the cost of rentals/purchases of tools to having a smith lathe it concentric to bore.
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Old 01-12-2017, 11:54 AM   #11
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I would just rent the tools from V8Merc124 and then thread it for 14x1 LH.
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Old 01-12-2017, 03:59 PM   #12
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Im leaning towards that. So what do i need to know about using an annular grinder?
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Old 01-12-2017, 09:26 PM   #13
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Quote:
Originally Posted by VforVandetta View Post
Im leaning towards that. So what do i need to know about using an annular grinder?

As far as I know get some tapping or cutting oil and then you just need a drill running at slow speed. The 7.62 guide will come with it. Run it in until you have cleared out about 3/4" of material for your threads.
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Old 01-13-2017, 11:35 AM   #14
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Quote:
Originally Posted by bda View Post
As far as I know get some tapping or cutting oil and then you just need a drill running at slow speed. The 7.62 guide will come with it. Run it in until you have cleared out about 3/4" of material for your threads.
^^^^^^^ THIS. If you are going to rent from V8 I would talk to him. Im sure he can fill you in on all the nuances of using the tools.
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Old 01-13-2017, 12:17 PM   #15
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Thanks guys, I'm pumped!

-V
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Old 01-30-2017, 01:56 AM   #16
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I just had my 7,62x39 23" VEPR threaded in 5/8x24 RH.
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