2A Armament The Builder Series AR10 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.
- Anodized aluminum
- Fits AR-10
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