Battle Arms Development, Mil-Spec Buffer Tube, 6 Position, Anodized Finish, Olive Drab Green, Fits AR-15, Aluminum Construction WARNING: This product can expose you to chemicals including lead, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov. Mil-Spec Carbine Length Receiver Extension / Buffer Tube 6 Positions Precision CNC from 7075T6 Aircraft Grade Aluminum Impact Forging Anodized OD Green Color Made in the USA Buffer, Buffer Spring, Castle Nut, and End Plate are not included 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.