Black Rifle Depot

SOPMOD AR-15 Lower Build Kit

(30 reviews) Write a Review
Usually Ships Within 3 Business Days-Excluding Holidays
Calculated at Checkout
MSRP: $164.95
— You save $65.00


SOPMOD AR 15 Lower Build Kit

The SOPMOD AR 15 Lower Build Kit from Black Rifle Depot is the perfect choice for anyone looking to build or upgrade their AR 15 lower receiver. This kit includes a Mil Spec SOPMOD Stock Kit, AR 15 Lower Parts Kit, and Mil Spec Buffer Tube Assembly, all made in the United States from top-quality materials. The 6-position 6061-T6 aluminum receiver extension, 3 oz buffer, castle nut, end plate, and carbine spring ensure a smooth and consistent operation of your rifle's recoil system. Whether you're a seasoned gun builder or a first-time DIYer, the SOPMOD AR 15 Lower Build Kit has everything you need to construct or upgrade your AR 15 lower receiver. And with a lifetime warranty, you can have peace of mind in your investment. Upgrade your AR 15 build with the SOPMOD AR 15 Lower Build Kit from Black Rifle Depot.

Kit Includes:

  • Mil spec SOPMOD Stock Kit (American Made)
  • AR 15 Lower Parts Kit (American Made)
  • Mil Spec Buffer Tube assembly (American Made)
    • 6-position 6061-T6 Aluminum Receiver Extension
    • 3 oz Buffer
    • Castle Nut & End Plate
    • Carbine Spring
  • Lifetime Warranty 



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Warranty Information

This kit comes with our 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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30 Reviews

  • 4
    Great product

    Posted by Jeramy Rogers on Dec 23rd 2023

    As always these kits are made of good parts and fit well

  • 5

    Posted by Unknown on Nov 24th 2023

    Very good parts kit and at a great price

  • 5
    lower parts kit

    Posted by nicholas on Oct 18th 2021

    One of the better lower parts kits I've bought, everything fit like a glove. For my next build I would buy this again. In my opinion, black rifle depot should have a youtube channel on how to assemble these. I think that would be cool. Again, great product. Will be buying again.

  • 5

    Posted by Dean Pollick on Apr 29th 2021

    Love the product and pleased with the customer service.

  • 3
    Most components worked extremely well, if the...

    Posted by Patrick Ralston on Feb 28th 2021

    Most components worked extremely well, if the fits were a little tight at first. Had an issue where the stock sheared off the edges of the locking by positions on the buffer tube

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