BROWNELLS - AR-15/M16 MIL-SPEC BUFFER TUBE ASSEMBLY

Features: Six position AR15/M16/M4 receiver extension assembly Includes Mil-Spec receiver extension/buffer tube, receiver lock plate, lock-nut/castle nut, carbine buffer and carbine buffer spring Buffer tube is Mil-Spec diameter and 6061 aluminum Carbine buffer weight is 3 oz Buffer spring is 17-7 stainless steel AR-15, Issue:10, Page:037 Brownells Christmas , Issue:4X, Page:021 Big Book Catalog, Issue:67, Page:037