- 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
Big Book Catalog, Issue:67, Page:037
Fits standard AR15/M16 lower receivers. Mil-spec diameter. Includes buffer tube, lock plate, castle nut, buffer and buffer spring.