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Product Discontinued by Manufacturer

2A Armament Builder Series AR15 Billet Buffer Tube Assembly has been discontinued by 2A Armament and is no longer available. Our product experts have helped us select these available replacements below.You can also explore other items in the Gun Parts, AR 15 Parts, Rifle Parts, AR15 Lower Parts, AR15 Buffer Assemblies yourself to try and find the perfect replacement for you!

Product Info for 2A Armament Builder Series AR15 Billet Buffer Tube Assembly

The Builder Series offers a vast number of 2A Armament components that have been made with the AR builder in mind. The Builder Series offers high quality products at a competitive price.image

The Builder Series AR15 Buffer Tube Assembly is manufactured in-house and finished with hard anodize 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 Latch Plate as well as a 2A Castle Nut.

Features of 2A Armament Builder Series Billet AR15 Buffer Tube Assembly

  • Billet machined from 6061-T651 aluminum for tighter concentricity than a forging or impact extrusion to reduce potential for bolt carrier binding
  • 5 Position adjustments
  • Mil Spec diameter 1.148 and thread diament of 1.185
  • Carbine length
  • Vented
  • Milspec Castle Nute and End Plate
  • Extended carrier support flange that supports the carrier for better anti-tilt performance
  • Self aligns with the buffer detent
  • 4.3 oz

Package Contents:

  • 2A Armament Builder Series AR15 Billet Buffer Tube Assembly

Gun Barrels

114 / 14
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Gun Parts and Accessories

130 / 30
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Gunsmithing Tools & Accessories

115 / 15
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Gun Triggers

116 / 16
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Magazine and Accessories

121 / 21
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Gun Sights

119 / 19
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Gun Stocks

117 / 17
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Mounts, Rings and Accessories

120 / 20
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Related Products to 2A Armament Builder Series AR15 Billet Buffer Tube Assembly

2A Armament Builder Series AR15 Billet Buffer Tube Assembly Unavailable & Discontinued Models

List of Unorderable Models

  • USED 2A Armament Builder Series AR15 Billet Buffer Tube Assembly, 2A-BSBT-A, EDEMO1, Used, Condition Like New, Inspect and Rebox , MPN: 2A-BSBT-A-EDEMO1 , Code: 2CU-BFA-KMTF-2A-BSBT-A-EDEMO-RE-A
  • 2A Armament Builder Series AR15 Billet Buffer Tube Assembly, 2A-BSBT-A , MPN: 2A-BSBT-A , UPC: 854299007987 , Code: 2CU-BFA-KMTF-2A-BSBT-A
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Last updated 2026-08-26 UTC.