The Builder Series AR15 Buffer Tube Assembly is manufactured in-house and finished with hard anodizing for lasting performance. It is billet machined from 6061-T651 aluminum for tighter concentricity than a forging or impact extrusion to reduce potential for bolt carrier binding. The assembly includes a 2A End Plate as well as a 2A Castle Nut.
2A Armament, Builder Series, AR15 Buffer Tube Assembly, 5-Position Billet Buffer, Aluminum End Plate, Steel Barrel Nut, Anodized Black Finish
- Anodized aluminum
- Fits AR-15

![Hornady Precision Hunter .270 WIN, 145gr, ELD-X - 20 Rounds [MPN: 80536]](https://www.tacticalwatchstore.com/wp-content/uploads/2026/10/hornady-precision-hunter-270-win-145gr-eld-x-20-rounds-mpn-80536.webp)








