LBE Unlimited AR-15 Buffer Tube Kit Features The LBE Unlimited Buffer Tube Kit centers on a six-position mil-spec diameter buffer tube paired with a carbine-length recoil spring giving an AR-15 builder a proven adjustable stock platform. The included H2 heavy recoil buffer adds extra mass to the reciprocating system which slows bolt carrier velocity and can smooth out the recoil impulse on many carbine-length AR-15 builds. A mil-spec receiver end plate and castle nut complete the rear of the lower securing the buffer tube to the receiver with the correct torque and alignment. Together these five pieces form a complete ready-to-install buffer assembly rather than a partial kit requiring separate purchases. LBE Unlimited machines its components to precise tolerances giving builders confidence that the parts will fit and function correctly in a standard AR-15 lower. The matte black finish matches the typical finish found on most AR-15 receivers and furniture keeping the build s appearance consistent. Because the kit bundles every part needed for the buffer system it saves builders the time and hassle of sourcing a tube spring buffer end plate and castle nut individually. For anyone building or upgrading an AR-15 lower this kit offers a durable complete buffer solution backed by LBE s reputation for quality parts. LBE Unlimited AR-15 Buffer Tube Kit Specifications Manufacturer: LBE Unlimited Model: Buffer Tube Kit Compatible Hosts: AR-15 Color: Black Finish: Matte Includes: H2 Buffer 6-Position Tube Carbine Spring End Plate Castle Nut Pieces: 5 Available At: GrabAGun