Southwest Defense

Build Components

AR Build Components List 01/25

Please note that the exact part(s) we utilize from the list below depend on market availability at the time of order. Therefore, please contact us if you would like to know the exact parts that would be used in your build if you ordered it today.

  • Lower Receiver – Wilson Combat precision CNC machined from a 7075-T6 aluminum forging and finished in Black Armor Tuff – 9mm Aero Precision, Four Peaks

  • Upper Receiver – Wilson Combat precision CNC machined from a 7075-T6 aluminum forging and finished in Black Armor Tuff – 9mm Aero Precision, Four Peaks

  • Barrel – Ballistic Advantage Match Grade and Rosco Bloodline series

  • Bolt Carrier Group / BCG – Aero Precision, Toolcraft, Wilson Combat, 158 Carpenter and Gibbz – All Rated Full Auto

  • Trigger – Rise Armament, Trigger Tech

  • Gas Block, Adjustable / Tube – Wilson Combat & Ballistic Advantage Stainless & Melinite

  • Butt Stock / Brace – SBA3, Wilson Combat, Magpul, Hera Industries

  • Buffer System – Wilson Combat, Aero Precision and Strike buffer & Spring

  • Furniture – (For Anodized Builds) Timber Creek, all M LOK (varies by model)

  • Handguard – Southwest Defense LLC. / Aero, Wilson Combat, all M LOK (varies by the model all 7075 T6 Aircraft Aluminum)

    NOTE: Beginning 01/01/2025 “pistol” AR’s will now have a 45mm handguard versus the standard 40mm. The reason is that many of our customers are adding suppressors (silencers).

    With that being said, the 45mm handguard will accommodate 95% of the suppressors on the market. Therefore, all you have to do is remove the current flash hider (which for the 5.56 is a ½ x 28 thread) and the suppressor will fit inside the handguard.

    If for any reason you prefer the standard 40mm handguard, let us know and we can still use that version.

  • Safety – Delta, Radian, Elftmann and Timber Creek (varies by the model)

  • Flash Brake – Options – KAK Industries, Tacticool22 and Ballistic Advantage

  • Take Down Pins – Delta Force, Yankee Hill Machining (varies by model)

  • Charger Handle – Options – Timber Creek, Odin, and Radian

  • Optics – Sig Sauer, Holosun, Riton and Trijicon
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