Aug 20, 2021 · The 9x39 using a 286 gr bullet at 1050 fps has 697 ft lbs of energy. For even another comparison, a 45acp using a 230 gr bullet traveling 900 fps only has 413 ft lbs on …

Jul 28, 2019 · The case taper of 9x39 should be fine with existing AR-15 magazine taper, it's the fat bullet that needs to be addressed. Not sure if grinding the internal ribs will work. I have a …

Sep 10, 2019 · In knowing that the 9x39 is based on the 7.62x39 case, I tried using a 7.62x39 magazine, but the follower was all the wrong geometry. I took the follower out and just sat 2 …

Mar 28, 2018 · Wiki lists 9x39 as being 9.26mm or 9.25mm in diameter depending on bullet type for service ammo. I'm wondering if there is enough clearance on US 9mm suppressors to …

May 28, 2019 · The 9x39 was designed to be effective subsonic all the time and I as I understand it it might be a better round than 300BO subs. The Russians encountered the same kinds of …

Jan 31, 2020 · 9x39 appears to outclass 300 blackout in virtually every regard, especially terminal performance in the subsonic envelope where the bulk of the .30 cal bullets used in 300 aren't …

Mar 16, 2021 · Some of the bullet design that the Russians have done in the 9x39 is pretty cool, but the gun itself is just an AK, with all of the AK drawbacks. You could build an AR-based gun …

Mar 3, 2024 · 9x39 can push a 280+ grain projectile very quietly, and it hits very hard. There have been several threads here discussing builds and load development. I know there are a few …

Oct 30, 2019 · When someone sells a million rifles that use 9x39 so that the ammo companies can scale up production to lower the per cartridge cost. Doubt this ever happens, wasn't 9x39 …

Mar 13, 2021 · Note: About AR mags and loading them with 9x39, the approximate tipping point is at the shoulder of the rnd, and against the false 5.56 bullet mold on the shoulder of the …