new!! heavy m4 / m16 replica airsoft pull back shell / bullet ejecting spring tactical military assault rifle w/ hop up (metal chamber and mag operation delta set)(Airsoft Gun) NEW!!! iSHOP M4 Airsoft Pull Back Shell Ejecting Spring Military Assault Rifle "Operation Delta Set" Operation: PULL-BACK / SHELL EJECTING, Back Stock: Adjustable, Shooting System: Adjustable Hop-up "Operation Delta" combo set includes: 1x M4 Rifle, 1x adjustable sling, 1x extra (full metal magazines), 6pcs + 2x boxes 30pcs each of extra shells, 1x bag of 1000 pcs LT Extreme Precision Premium 5.95mm BBs (+/- .015mm) Velocity: 345 fps w/ 0.2g BBs, 5.4 lb. gun net weight, Mag Capacity 30 shells, 31.9"-35.4" overall length iSHOPusa Model: i P1168 / Color: Black