KWC M4A1 with M203 Underbarrel Launcher 6mm Caliber Air Rifle - The KWC Spring powered airsoft rifle requires no battery or gas to operate. It comes attached with a top rail that allows for the attachment of most Picatinny accessories such as lights, grips and lasers. The Mock M203 provides a more aggressive look and along with the durable ABS polymer construction. The M4A1 Airsoft Rifle is a dual charging action - spring can be charged by M203 like a pump or by charging handle. All airsoft replicas are shipped with a federally mandated orange tip. FEATURES FPS Range: 250-280 FPS Length: ~31.42in Weight: 3.09lbs Caliber: 6mm Ammunition: BB BB Capacity: 18 Rounds Magazine Capacity: 350 Rounds Spring Powered Fire Modes: Single Shot, Safety Action: Semi Automatic Hopup: Yes, Adjustable Material: Polymer / ABS Includes: Rifle and Magazine