PTR 32P short barreled rifle. The short 8.5” 7.62x39 barrel doesn’t let all the powder in the cartridge fully burn before exiting, so a longer silencer or one with a flash hider is very useful. This is a very reliable set up. Subsonic ammo will not cycle in it though.
It needs a low back pressure silencer to cycle properly, otherwise you get bolt bounce off of the first shot and a light strike after that. After finding that out with my Specwar 7.62 and Chimera (both perfect on other guns), I first used my OSS HX-QD 7.62 which worked well, but my PTR 51P sbr prefers it. Now my favorite on here is the Micro 30 with flash hider. Because of it’s wider bore and only 3 baffles, it’s a low back pressure can that functions well and sounds great, although not as low of back pressure as the OSS. The Radiant has a wider bore as well, and function well on this gun. It has a longer length, so it shuts this gun up even more. I prefer the shorter Micro 30 just because I still wear ear pro with both being that I’m using supersonic rounds that are exiting the barrel close to my ears.