Muzzle Threading

[bal_g23]

Where would I go to have an Arsenal SLR-106F with 24x1.5 RH muzzle threading converted to 1/2x28 RH?

[DefensiveCarry.com]

[dukalmighty]

dude47jp on gunbroker.com has an auction for threading barrels you may give him a call and see if he can help you out

[Ram Rod]

Years ago I sent my SLR95 to Global Trades in Texas to have the muzzle brake installed on mine. I would ask why you'd need to change threads on it but I'm sure there's a good reason. I'm trying to think of alternatives for you short of shipping your firearm. Check with a local tool and die shop or a bolt and screw supply. Let me get this straight--from 1/2x24 to 1/2x28? How long are the threads on the muzzle inch wise? 3/4"? I don't think it could be done actually because you'll need more meat than what's currently there metal wise for more threads per inch since that's actually what you're needing if I follow you. See what I'm saying? That's a tough one for me to think of as to how. Then again I'm not a machinist-just a mechanic. If I was at work I could ask a machinist and they could suggest something or tell me to go take a hike. I'm sure someone else will see things in a better light.

[bal_g23]

The SLR has an AK-74 type muzzle break if Im not mistaken and Im trying to be able to put AR-15 threaded muzzle breaks on the rifle. Is this possible? Im a little confused myself

[Rob72]

Before you go that route- which brakes are you interested in? Smith and Yankee Hill are both essentailly the top dogs, and both offer metric models.

If that isn't an option, these guys can probably take care of you:
Muzzle Brakes

[bal_g23]

im thinking of primary weapons FSC556

Heres some videos-the second one is especially interesting

http://primaryweapons.com/UserFiles/Media/FSC556_dn.wmv

http://primaryweapons.com/UserFiles/...FSC556_web.wmv

[HotGuns]

24MMx 1.5 is equal to a .945 inch diameter.

If that is the correct thread,which I doubt... then you will have no problem turning the barrel down to .500 and threading for 28 TPI.

Typically, a thread needs to be as long as its diameter for full strenth...meaning that a half inch dia. thread needs to be at least a half inch long.

Most AK muzzle brakes are threaded for 14mm x1 left hand.

14mm being .551 in diameter. Technically, you could cut down the 14 mm diameter to .500 dia. but it wouldn't clean up...meaning that some of the thread profile would still be left. So, when you cut it to .500 and tried to thread it for 28 threads per inch, you would get some interruptions in the thread and not have the best thread quality.

Of course, that depends on the quality of the threads to begin with and depends a lot upon the original depth of the threads. If the threads are not cut to full depth, then they might "clean up". If cut to full depth then they probably wont clean up, but you may still be able to get a thread that works. Maybe.

Since its so close, it might not be a good idea. If you have the barrel length, a more advisable solution would be to cut that part of the barrel off, and use the clean barrel to put the 1/2-28 thread on. This is best threaded in a lathe to insure that the threads are concentric to the barrel.

The easiest way would be to get the style muzzle brake that you want with the correct threads for the barrel. There are a multitude of brakes out there that are threaded for AK's and AR's, just make sure you get the right thread and screw it on.