This is what 2A Armament says :



This aluminum buffer tube assembly includes our AR15 billet buffer tube, our lightweight latch plate and a castle nut manufactured to same high 2A Armament standards and finish.

Buffer tube features:

    Billet machined 6061-T651 aluminum for tighter concentricity than a forging or impact extrusion to reduce potential for bolt carrier binding.
    8 position adjustment with machined indicators visible through any stock with a viewing port located at the stock latch pin.  Extended positions, increment adjustments have a finer spaced length of pull.
    Mil Spec extension diameter of 1.148, and thread diameter of 1.185
    Carbine length
    Extended carrier support flange that supports the carrier for better anti-tilt performance.
    Self aligns with the buffer detent.
    Chamfered edges on the stock guide ramps for better feel
    Hard Anodize finish - Type III Class 2
    Weight 3.45 oz

Latch Plate:

    Lightweight machined aluminum
    Hard anodize finish - Type III Class 2
    QD mount
    Weight .15 oz

Castle Nut:

    Standard steel castle nut
    Black oxide finish
    Weight .60 oz

Buffer Tube Assembly - AR15

SKU: 2A-BTA6-1
$99.00 Regular Price
$94.00Sale Price