Battle Arms Development Mil-Spec Buffer Tube, 6 Position, Anodized Finish, Olive Drab Green, Fits AR-15, Aluminum Construction AR15RE-MIL-6C-ODG This Battle Arms Development 6 Position Carbine Buffer Tube is constructed from 7075-T6 aircraft-grade aluminum has a hard black anodized finish" will fit all standard AR15/M16/M4 lower receivers" and is made in the USA. Battle Arms Development" Inc. (B.A.D. Inc.) is a design" research" and development firm incorporated in 2009 with a focus on small arms design including firearm components" tools" gauges" accessories" and complete weapon systems.