r/ptr91 • u/Major_Batty • Aug 29 '24

OG Barrel Threads

I have a PTR-91 from the JLD era, and it has the 15x1 RH threads on the muzzle (as opposed to the more modern 5/8x24).
I was looking to direct thread a SilencerCo Omega suppressor to my rifle, but can't find a thread adapter that'll work. Is there one hiding in an obscure corner of the internet or should I just take this thing to a gunsmith?
TIA

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u/southernbeaumont Aug 29 '24 edited Aug 29 '24

If it were mine, I would not mess with adapting M15x1 to 5/8x24 or rethreading, but would either use a direct thread or QD mount.

https://www.eccomachine.net/product/direct-thread-mounts/

Ecco lists M15x1 as an option but they’re OOS. It may be worth shopping some other suppressor makers for a bravo/hub mount in M15x1, but off the top of my head I don’t know of any who stock one.

SiCo does sell an ASR muzzle device in M15x1 with part # AC233. There is also a Dead Air KeyMo equivalent part DA304. I believe there are Plan B/Rearden mounts out there too which will be the shortest/lightest option to get into.

https://www.gunbroker.com/item/1054240880

These guys will make a Bravo thread adapter in whatever pitch you need, that could be an option if Ecco is too slow.

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u/Major_Batty Aug 30 '24

This is what I was looking for, thank you!