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
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
Lightweight machined aluminum
Hard anodize finish - Type III Class 2
Weight .15 oz
Standard steel castle nut
Black oxide finish
Weight .60 oz
$99.00 Regular Price