Guntec Milspec Carbine Buffer Tube Set Features The Guntec USA Milspec Carbine Buffer Tube Set centers on a 6 position receiver extension built to the mil-spec diameter the standard that the vast majority of carbine stocks are designed around. Aluminum construction keeps the tube light while standing up to the repeated impact of a sliding stock cycling through its positions. The included 3 oz carbine buffer and chrome-finished spring are matched to the tube for proper bolt carrier cycling and reliable lock-up. Together these parts replace a worn-out or mismatched buffer system with components sized correctly from the start. Rounding out the set the mil-spec end plate and castle nut secure the receiver extension to the lower holding everything in correct alignment under recoil. Because the kit is complete a builder is not stuck figuring out which end plate or castle nut pairs correctly with a given tube. This makes the set a practical choice for finishing a new build or swapping worn components during routine maintenance. For AR-15 owners upgrading or repairing a carbine stock setup this Guntec USA set delivers the matched hardware needed in one purchase. Guntec Milspec Carbine Buffer Tube Set Specifications Manufacturer: GunTec Model: Milspec Carbine Buffer Tube Set Type: Milspec Carbine Buffer Tube Includes: Receiver Extension Carbine Buffer Chrome Spring End Plate Castle Nut Material: Aluminum Buffer Weight: 3 oz Positions: 6 Country of Origin: Made in the USA Available At: GrabAGun