Another classic variant of the M16, the M16A4 is the standard issue for the U.S. Marine Corps. It has a metal body and features a muzzle velocity of 350 FPS. * Adjustable sights * Hop-Up * Propulsion: Electric * Weight: 6.2 lbs. * Length: 39.2" * FPS .20g BB: 350 * Mag Capacity: 300 / 5000 * Extra Mag Numbers: 18511016 (300 round), 48608 (300 round) or 185111 (5000 round) * Extra Battery Number: BAT842500LG * Gears: Metal Returns: Only items with manufacturer defects will be considered. All returns must have a return authorization (RA) number. Please call before you return any item to obtain a return authorization number. You must place the return authorization number clearly on your return label. All returns must be made within 30 days of shipment to be considered. ANY RETURN THAT DOES NOT HAVE A RETURN AUTHORIZATION NUMBER WILL BE REFUSED. All authorized returns will be issued a refund/replacement/credit at the discretion of Palco Sports, Inc.