The M215 M4 series is manufactured to military specifications, features a rifle-length gas system, free-floated inside a 13” Knights Armament M4 RAS Forend Assembly (Commando I) and MOE Handguard (Commando II). M215 M4 is chambered in 5.56 x 45mm NATO. Barrel is 11.5” (29.2cm), Hammer Forged, Chrome Lined with a 1:7 Twist. An ambidextrous bolt release and selector offer left-handed users the ergonomic advantages inherent to M4-based controls. Upper receiver features MIL-STD 1913 Top rail and is finished in a Hard Coat Type III Anodized. These products are exclusively for Military and Law Enforcement.