Your Browser is OutdatedWhere is the gas block for the piston system located? The picture looks like the Gas Block piston system is a rifle length 12" system. — 1 Answer
Hence it's description as a "long stroke" piston system. The best way to describe it is to describe what you see when you remove the BCG. It is attached to a long rod which ends with a removable piston that sits inside the exhaust chamber. Short stroke systems normally just cause push a rod which sits inside the receiver, to knock rather than blow the bolt back. These PWS systems are, in most opinions, far superior for many reasons. You'll need to look up that info. You won't go wrong with PWS.