[utdutt]

I’ve been looking for a reason to buy one of those Sig piston driven AR’s, maybe this is it

[IndispensableDestiny]

I’ve been looking for a reason to buy one of those Sig piston driven AR’s, maybe this is it

Gas drives the piston.

[Afterguard]

Yeah but, the piston is gas driven. (See AK-47, et al). Just no escaping gas operated guns unless it’s a simple blowback bolt like pistol caliber carbines and handguns. Oh wait... That’s what the moron wants, isn’t it.