Guntec AR-10 Mil-Spec Buffer Tube Set Features The Guntec USA AR-10 Mil-Spec Buffer Tube Set is machined from T6 aluminum to Mil-Spec six position dimensions ensuring compatibility with standard collapsible stocks built for the .308 caliber AR platform. The kit bundles the buffer tube itself with the end plate and castle nut needed to properly secure it to the receiver extension removing the guesswork of matching separate components. Because all the hardware is Mil-Spec sized builders can be confident the parts will fit correctly without needing to source additional adapters or shims. Included in the kit is a .308 CAR short buffer and a matching buffer spring both sized specifically for the shorter carbine-length tube used in collapsible stock configurations. At 11 oz total the complete set keeps the rear of the rifle from becoming overly heavy while still providing the mass and spring tension needed for reliable cycling in a .308 caliber rifle. The matte finish matches typical AR-10 hardware for a clean consistent appearance once installed. This Guntec USA kit gives AR-10 and AR-308 builders a complete ready-to-install solution for a collapsible stock build. Guntec AR-10 Mil-Spec Buffer Tube Set Specifications Manufacturer: GunTec Model: AR-10 Mil-Spec Buffer Tube Set Compatible Hosts: AR-10/AR-308 Material: Aluminum Finish: Matte Includes: Buffer Tube End Plate Castle Nut CAR Short Buffer Spring Weight: 11 oz Country of Origin: Made in the USA Available At: GrabAGun