The Classic Army M4 Carbine is an excellent all around M4 that is designed to get the job done. The standard carbine handguard houses multiple types and sizes of batteries for added flexibility when choosing a battery. Also featuring the officially licensed Colt trademarks this gun makes for a great collectors item or MILSIM enthusiast centerpiece. Built from aluminum and nylon fiber this rifle is lightweight, reliable, and durable. Classic Army also manufactured this rifle with pre-installed upgrade parts such as 9mm bearings, a 6.03mm tightbore barrel, quick-change spring guide, high torgue motor, and other stainless steel internals.