This aluminum buffer tube assembly includes an AR10 billet buffer tube" lightweight end plate and a castle nut manufactured to same high 2A Armament standards and finish. The buffer tube features an 8 position adjustment that has machined indicators visible through any stock with a viewing port located at the stock latch pin. It is billet machined 6061-T651 aluminum for tighter concentricity than forging or impact extrusion. The end plate is lightweight machined aluminum and the castle nut is a standard steel castle nut.