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NewbieDave
09-01-2014, 1:59 AM
Anyone know if brake/FH designed for AR10 will work on a 7.62x39 round? I want to get an AK barrel rethreaded for 5/8-24 to give me more options with FH & brakes.

Googling is telling me that the 7.62x39 bullet is fatter then a 7.62x51... true?


dpc

Ryan in SD
09-01-2014, 2:15 AM
Not a whole lot of AK barrels that are .625" in dia up at the muzzle end.
I wanted to do the same thing on my PSL barrel at first :(

Also, I think the 7.62x39 projectile is .311 and the .7.62x51 is .308. That would not be an issue with a muzzle device.

ratled
09-01-2014, 6:50 AM
SOTA sells some nice 7.62 x 39 brakes
http://sotaarms.com/component/jshopping/ar-15-upper-parts?Itemid=0

ratled

dwtt
09-01-2014, 7:29 AM
If you're going through the trouble of rethreading the barrel, just get a reamer and open the .308 muzzle brake a few mils and you'll be OK. I can vouch for the effectiveness of the Armalite muzzle brake, but I don't think they sell it any more.

kalieracer
09-01-2014, 7:33 AM
14LH is the way to go,

Click Boom
09-01-2014, 7:38 AM
If you're going through the trouble of rethreading the barrel, just get a reamer and open the .308 muzzle brake a few mils and you'll be OK. I can vouch for the effectiveness of the Armalite muzzle brake, but I don't think they sell it any more.

Most 308 MB's have a hole diameter of .340, I think. So it should be fine.

And there are a lot of interesting 308 brakes out there, ive considered putting one or two out there on an as yet unthreaded saiga... but still waiting for the right combo.

I know it's 5.56, but that build chewbacca has with the surefire brake is pretty cool.

in 14x1LH, you will have less expensive options, though.

I just want some really short, effective brakes for muzzle rise for my featureless carbines. thinking about trying out the tapco slot brake, i think its only like 1.5 inches long, as opposed to 3+ inches for bulgy style 74 brake

sharxbyte
09-01-2014, 8:11 AM
I believe that the bullets for .308 and 7.62x39 are interchangeable. I was looking into reloading x39 and someone recommended a .308 mould.

robcoe
09-01-2014, 8:38 AM
I believe that the bullets for .308 and 7.62x39 are interchangeable. I was looking into reloading x39 and someone recommended a .308 mould.

the bullet might be slightly loose, the standard Russian 7.62 bullet is .311, the .308 is really .308. 3 mils isn't a huge difference but it could be a factor.

bruss01
09-01-2014, 8:39 AM
Anyone know if brake/FH designed for AR10 will work on a 7.62x39 round? I want to get an AK barrel rethreaded for 5/8-24 to give me more options with FH & brakes.

Googling is telling me that the 7.62x39 bullet is fatter then a 7.62x51... true?


dpc

Check into this
Good Iron 5.56mm/6.8mm/.30cal Muzzle Brake
For use with any weapon threaded 5/8x 24, up to .30 Cal. Includes jam nut. Heat treated 8620 CM steel.

http://www.smithenterprise.com/products07.html

This is a great brake that I have used for a few years with my x39 AR. It is terrific. I would definitely go with another Smith Good Iron for a .308.

sffred
09-01-2014, 9:04 AM
14LH is the way to go,

^^^^ what he said 100%. Unless you got a yugo krink (26x1.5) or a russian/russian variant with a threaded FSP (24x1.5), but as Kaliracer said 14x1 LH all day long!