PTR-91 muzzlebrake

[RP1911]

If the serial number starts with AW, what is the thread pitch?

Tried calling and emailing PTR but they are backlogged on calls and emails.

TIA

[hitdank]

15x1

[Regular guy]

15x1

Yes^

[elcajon]

I put on a regular thread pitch for 7.62 x 51

[RP1911]

Thank you for the responses.

I read that PTR had different barrels on some PTR91s that had different thread pitch.

[1919_4_ME]

They changed the thread pattern to the standard 5/8-24. If your gun has the updated newer paddle mag release then you have new thread pitch. No paddle mag, then you have the 15x1 thread.

[jmpeal]

Yes, I do not have the paddle mag release, so mine takes the 15x1 thread. Got the Manticore nightbrake and comes with a clip.

[RP1911]

I have the 15x1 thread pitch also. Ordered Manicore from www.robertrtg.com. Manicore does not have any currently. They have the 5/8-24.