using a gas piston arranged concentrically around the barrel

Full Title

Mechanisms or systems operated by propellant charge energy for automatically opening the lock > gas-operated > using a gas piston arranged concentrically around the barrel

Classification Context

Section:

MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING

Class:

WEAPONS

Subclass:

FUNCTIONAL FEATURES OR DETAILS COMMON TO BOTH SMALLARMS AND ORDNANCE, e.g. CANNONS; MOUNTINGS FOR SMALLARMS OR ORDNANCE