The spring-powered Colt M4A1 is a solid performing airsoft gun for light airsoft skirmishes and casual backyard plinking. This gun is a full-scale replica of a real M4 and has a plastic body that is comfortable to carry during extended airsoft skirmishes. The Colt M4A1 features an adjustable stock that can comfortably accommodate users of any body type, a high-capacity 550 rd magazine and a shot velocity of 330-352 fps (using .12g BBs). Spring-powered guns are among the most reliable airsoft guns due in part to their simplistic internal components. Attach a sling to the sling mounts for an additional carrying option. This is a great gun for novice shooters and a solid addition to the amory of the experienced airsoft enthusiast.