Geissele Automatics AR-15 Buffer Tube Features The Geissele Automatics Buffer Tube is machined from 7075-T6 aluminum a high strength alloy chosen for its ability to resist flex and wear under the repeated cycling of the buffer and action spring. Finished in Type 3 hardcoat anodize in black the coating provides excellent corrosion and abrasion resistance though some natural color variation can occur as part of the anodizing process. The tube is built to carbine length and mil spec diameter ensuring broad compatibility with most mil spec diameter AR-15 and AR-308 stocks already on the market. Six stock positions let the shooter adjust length of pull to match body size clothing layers or shooting stance. This rigid and durable buffer tube conforms to all mil spec standards giving builders confidence that it will function correctly with a wide range of mil spec buffers springs and stocks. Made in the USA and weighing just 3.7 ounces the tube adds minimal weight to the rear of the rifle while providing a stable platform for the stock. Included in the package is a high quality mil spec castle nut and end plate giving builders everything needed to complete the buffer tube installation without sourcing additional hardware. The Geissele Premium Mil-Spec Buffer Tube is a precision American made upgrade for any AR-15 or AR-308 build for sale at GrabAGun. Geissele Automatics AR-15 Buffer Tube Specifications Manufacturer: Geissele Automatics Type: Buffer Tube Color: Black Finish: Anodized Material: 7075-T6 Aluminum Positions: 6 Buffer Tube Type: Mil-Spec Buttstock Fit: Carbine Compatible Hosts: AR-15 AR-308 Weight: 3.7 oz Included: Castle Nut End Plate Available At: GrabAGun