I have a type 81 lmg that I want to add a muzzle device on, it doesn’t have the old m16x1 thread but the new one. The problem is I don’t know if the new one is m14x1 rh or if it is a 5/8 x24. I saw on a thread that the new thread is the same as a vz 58 which is a m16x1 rh but kodiac defense sells a compensator with the being 5/8x24. I like the way a2 birdcage looks and want to put it on my rifle but don’t know what thread it is. I am new to guns and would really appreciate if someone can help me figure out what thread is on the new type 81 lmg thanks.