cdb.... Your right, this is a gas operated action with the operating spring in the butt stock and connected to the back of the bolt by a connecting link. Same system as use on the CZ 9xx series of shotguns. It is not a Kinematic design. The bolt design is the old 3 piece type: bolt plate,bolt and single locking lug at top. Oh and to answer your question, yes it has a gas piston. 2 to be precise, one heavy and one light. Inertia/gas appears to be just another marketing ploy.
But the fact still remains, it ain't a bad shotgun at this point. Just need to see if it will hold-up in the long run.
By the way, I play a harp, what kind are you giving away?
