Designed for serious CQB mil-sim Airsoft action and force-on-force training, the Umarex Elite Force HK MP7 Navy Gas Blowback Airsoft Rifle is a true 1:1 scale replica with a hard-kicking blowback action. Operating on either propane or green gas (not included), it sends .20-gram BBs downrange at up to 360 fps. The top optic rail and side rails on either side provide endless customization options. The collapsible metal stock provides versatility for 2-handed or 1-handed firing stances. 40-round drop-free magazine. Includes front and rear flip-up sights. True 1:1 scale replica Officially licensed from Heckler & Koch Hard-kicking blowback action Designed for real mil-sim and force-on-force training Operates on propane or green gas (neither are included) Collapsible metal stock 40-round drop-free magazine Up to 360 fps velocity