RIFLE LENGTH BUFFER TUBE – A2 Luth-AR's A2 Rifle Buffer Tube is constructed out of 6061-T6 Aluminum. Features a hardcoat anodized black finish that is resistant to corrosion and wear. It works with both 223/5.56 AR-15 platforms and 308/7.62 AR-10 platforms and is compatible with an A2 fixed butt... See More