The Umarex Legends M3 Grease Gun is a faithful, full-auto replica of the iconic M3A1 SMG used from 1944 onward. Featuring authentic blowback action and true open-bolt operation, this .177 caliber BB gun delivers an immersive shooting experience. Powered by two 12g CO2 cartridges, it fires at an impressive 1,050 rounds per minute in either semi-auto or full-auto mode. Key details include a collapsible wire stock, hinged dust cover, fixed peep sights, and a drop-free 60-round magazine. With up to 120 shots per CO2 charge, the M3 Grease Gun is built for historical realism and all-out fun