Black Rifle Depot

AR 15 Lower Build Kit

(279 reviews) Write a Review
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MSRP: $109.95
— You save $20.00


AR 15 Lower Build Kit

The AR 15 Lower Build Kit from Black Rifle Depot stands as the pinnacle of excellence for those keen on crafting or upgrading their AR 15 or related lower receiver. This all-inclusive package delivers everything crucial for your assembly needs: a versatile 6-position Mil-Spec Stock adorned with a sling attachment, an industry-standard OEM AR 15 Lower Parts kit, a top-tier Complete Mil Spec Buffer Tube Kit accompanied by a US-made Stock, a 3 oz buffer, the trusty castle nut, a durable end plate, and a robust carbine spring. Emphasizing its dedication to premium craftsmanship, the Mil-Spec Lower Parts Kit, meticulously designed and produced in the USA, ensures your lower receiver assembly is smooth and flawless. Entrust your build to a kit with quality and durability; every component is shielded by Black Rifle Depot's unwavering lifetime warranty. Catering to both the adept craftsman and the budding DIY enthusiast, the Black Rifle Depot AR 15 Lower Build Kit delivers the essential components and the assurance to finalize your lower receiver project with unmatched confidence.


  • MIL SPEC LOWER PARTS KIT (American Made)
  • Complete Buffer Tube Kit W/Stock (American Made)
    • 6-position 6061-T6 Aluminum Receiver Extension
    • 3 oz Buffer
    • Castle Nut & End Plate
    • Carbine Spring
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Warranty Information

This kit comes with our LIMITED LIFETIME WARRANTY* in the rare case you need one. Each part is personally inspected for quality and hand packaged to ensure your satisfaction. *Note: Warranty only valid when used with mil-spec lower, warranty does not cover use with 80% lower.
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279 Reviews

  • 5
    Lower parts kit

    Posted by James walsh on Mar 13th 2024

    BRD consistently delivers kits of superior quality components. Far better than most parts that come kit guns.

  • 5
    AR Build Kit

    Posted by Shawn B on Feb 6th 2024

    Always good products.Never had a problem with Black Rifle Depot. I would trust my life, and my family's with BRD products.

  • 5
    lower built kit

    Posted by Grady on Jan 11th 2024

    great product

  • 5
    Great Product

    Posted by Joe on Oct 9th 2023

    Great Product for the price. Fast shipping. Good service.

  • 5
    Every thing fits perfectly

    Posted by Larry Roberts on Oct 5th 2023

    Best by far compared to others

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