Our friends at Advanced Armament Corporation are happy to sell a silencer to owners of the legendary AK series Russian rifle, provided your state doesn’t have a thing about quiet[er] guns and you fill out the necessary paperwork and you send AAC money for the can. But the silencer maker doesn’t recommend it. “Looser tolerances” and all that: “Most AK type rifles have M14x1LH threads for the flash hider. However, many times there is not a straight line on an AK and these flash hider threads may not be concentric to the bore. With a Flash Hider, this is not going to be as big an issue. Add a silencer to off-center threads and you can get end cap or baffle strikes. For this reason we do not make a muzzle device for mounting silencers threaded M14x1LH.” But wait! There’s more! Or less. More or less . . .
The next thing about AK type rifles is they have an open gas system. They bleed gas straight off the barrel and allow supersonic gas to escape into the atmosphere. This supersonic gas causes additional noise. This means that a suppressed AK will not be as quiet as say a DI AR15 type rifle.
The last thing to know is that while suppressed AK type rifles is that while full sized rifles sound “OK”, Krink style AK type rifles are just LOUD, even with a silencer. Much like a 7.5” AR15 is never quiet.
Note to AAC: sometimes selling a product is more hassle than it’s worth, for all concerned.