MPN: 2A-BTU8-1 / 2A-BTA8-1


  • 8-position adjustment for finer spaced length of pull
  • Mil-Spec extension diameter
  • 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
  • Vented
  • 5/8" longer than the AR-15 version buffer tube - increased length of pull
  • Can use on both AR-10 and AR-15 builds


  • Material: Billet Aluminum
  • Weight: 3.65 oz.
  • Finish: Type III Class 2 Hardcoat Anodize


  • AR-15 and AR-10


  • 2A Armament AR-10 Buffer Tube
    • 1x Mil-Spec 8-position buffer tube
  • 2A Armament AR-10 Buffer Tube Assembly
    • 1x Mil-Spec 8-position buffer tube
    • 1x Castle nut
    • 1x Lightweight QD End Plate


If you’re building your dream AR-10 or upgrading your existing weapon system, you don’t have to settle for poor quality parts just because you want the versatility of Mil-Spec sizing. When you’re ready to buy a new AR10 Buffer Tube, 2A Armament’s AR-10 Mil-Spec Buffer Tube Assembly is what you need to rise above the rest.

Every one of 2A’s Mil-Spec buffer tubes is precision machined from superior grade aluminum billet. By adhering to strict specifications 2A assures that you won’t suffer from the inconsistencies caused by manufacturing buffer tubes by forging and extrusion processes. Real concentricity means no more forcing oblong tubes into a round receiver thread, and you’ll be a lot less likely to encounter issues with carrier binding.

2A Armament’s quality manufacturing brings the shooter more than just simple fitment. The 2A AR10 Buffer Tube is designed with a longer flange for better carrier support. That means you won’t be plagued by too much tilt. Precision machining assures you won’t have problems with detent alignment, the fit is automatic, no tinkering or gritting of teeth required. 2A even gave a little extra love to the guide ramps on their tubes. The ramps feature chamfered edges, this gives an effortless feel to adjustments for a real premium rifle build.

The 2A buffer tube is marked at eight separate positions that can clearly be seen through the port on most adjustable stocks. Set your pull length where it’s most comfortable, move it and come back to where you were with certainty. Don’t spend your time searching for the proper pull length, know where it is so you can concentrate on the shot.

The 2A Armament AR10 Mil-Spec Buffer Tube Assembly includes a lightweight latch plate as well as a quality castle nut. You’ll have everything you need to be stock ready, and it’s all coated in a Type II Class2 hard anodized finish for durability and corrosion resistance.

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