AR-15 6 Position Aluminum Buffer Tube Kit, Mil Spec PRODUCT DESCRIPTION Kit includes 3oz Aluminum Buffer, 6 Position Buffer Tube, Castle Nut, Spring and End Plate • Precision Machined from Premium Aircraft Grade Aluminum • Matte Black Anodizing with Type III Class II Hard Coat • Tightest Tolerance Control for Zero-Gap Spring: Industrial Grade Steel Heat Treated Solid Machined Construction Black Oxide Finish Buffer Spring For Mil Spec And Commercial Buffer Tubes Mil-Spec 6-Position Tube: Precise CNC Machining Tight Tolerance Control with Zero Gap Fitment w/ Buttstock and Receiver Construction of T6 6061 Aircraft Aluminum Matte Black Anodizing with Type III Anodizing Includes one Buffer Castle Nut and a Standard End Plate AR-15 6 Position Buffer Tube, Comm Spec PRODUCT DESCRIPTION AR-15 6 Position Buffer Tube, Comm Spec. • Black • Anodized Aircraft Aluminum Construction • 7.7” Length • 6 position adjustable AR-15 Carbine Length Buffer Spring - Steel PRODUCT DESCRIPTION This steel b