The TacFire MAR047-A Complete Mil-Spec Buffer Tube Extension Kit delivers unmatched durability and performance for optimal firearm functionality. Engineered from aircraft-grade aluminum, this comprehensive kit includes a six-position buffer tube, standard buffer spring, 3oz carbine buffer, castle nut, and lower receiver end plate. Weighing just 9.9oz, it ensures lightweight handling while remaining robust and reliable. 6 Position Buffer Tube Buffer Spring (Colors may Vary) Recoil Buffer (Colors may Vary) Castle Nut End Plate Transform your rifle's performance with this essential mil-spec upgrade.