double eagle m83a2 m16 electric airsoft gun full auto fps-250 collapsible stock, aiming sight(Airsoft Gun) Features: Full 1:1 Scale Caliber: 6mm Power Type: AEG Fully and Semi Auto Electric Airsoft Rifle Integrated R.I.S. (Rail Interface System) Full-Auto and Semi-Auto Working Safety Switch R.I.S. Tactical Rails (Rail Interface System) Metal Internal Barrel Removable Carrying Handle Front and Rear Adjustable Sights Adjustable Hop Up FPS: 250, Magazine Capacity: 70 BB's Length: 37 Inches