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    PSA 9MM SBA3 MOE EPT Pistol Lower Assembly Kit

    PSA 9MM SBA3 MOE EPT Pistol Lower Assembly Kit

    Here's the one-stop-shop for building a highly efficient and ergonomic lower for your next AR-9 pistol. This ensemble features parts from some of the best brands out there. First of all, you get the Magpul MOE trigger guard and pistol that will make...

    Was: $299.99
    Now: $189.99
  • Magpul® MOE® AR-15 Build Kit Magpul® MOE® AR-15 Build Kit 2 Magpul® MOE® AR-15 Build Kit 3 Magpul® MOE® AR-15 Build Kit 4 Magpul® MOE® AR-15 Build Kit 5

    Magpul® MOE® AR-15 Lower Build Kit

    We don't want to say this is the kit to end all kits, because that would be too cliché. So we'll just tell you this is the kit to end the lower half of your AR build. If you got your hands on a stripped lower and you're ready to build, this kit...

  • MOE+® EPT SBA3 Lower Build KIt

    MOE+® EPT SBA3 Lower Build KIt

    If you're building an AR-15 in pistol configuration, we can help you complete the lower half of your rifle while keeping you legal at the same time. To help with this, we've assembled this MOE+® EPT SBA3 Lower Build Kit. It comes with everything you...

  • PSA MOE SBA3 Lower Assembly Kit

    PSA MOE SBA3 Lower Build Kit

    Got your stripped lower and decided on making an AR-15 pistol, or maybe you want to change things up and convert your SBR into a pistol. Then check out this SBA3 lower assembly that features parts from popular and reliable brands. It includes Magpul MOE...

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Includes every part required for your AR's lower, minus the stripped lower itself.

The classic black rifle is split into two primary parts: The AR15 upper assembly, and the AR15 lower assembly. Our mil-spec AR15 lower assembly options include everything you need to turn a box of parts into a range-ready rifle in a single day. All our AR15 lower assembly parts are compatible with our available AR-15 uppers and 80% lower receiver units! All our lower assembly parts are mil-spec to guarantee compatibility with other retail AR-15 parts.

Need help? Here's how to install your lower assembly kit.

Quality lower assembly kits at affordable prices

In each lower assembly or parts kit, you'll find a quality, single-stage trigger. Every trigger is made to break cleanly and reliably, with little take-up, over-travel, or creep. Builders who want to upgrade their lower assembly or parts kits should take a look at the new RA LE145 drop-in trigger! It's compatible with all our lower assemblies and parts kits and makes for a major, affordable upgrade for your AR-15 rifle or pistol.

Lower Build Kit Features and Specs:

  • 100% mil-spec fit and finish
  • CA-Compliant AR-15 parts available
  • Compatible with 80% lowers and retail lowers
  • Includes everything you need to assemble a stripped a lower
  • Proudly made in the USA
  • Lifetime Warranty

State Laws May Vary

Contrary to federal law, some states have either restricted or banned the sale, transfer, and ownership of 80% lowers, firearm blanks, and other gun parts. Because of these restrictions, we cannot ship our products to certain states. Please confirm whether your state is restricted on our Shipping & Return Policy before placing an order. We cannot fulfill orders to restricted states if placed.


DISCLAIMER: If you are new to the world of DIY gun building, you likely have a lot of questions and rightfully so. It’s an area that has a lot of questions that, without the correct answers, could have some serious implications. At, we are by no means providing this content on our website to serve as legal advice or legal counsel. We encourage each and every builder to perform their own research around their respective State laws as well as educating themselves on the Federal laws. When performing your own research, please be sure that you are getting your information from a reliable source.

We are a national retailer of individual components and not all products depicted on this website are legal in every state. Shipping of various products found on this website are prohibited to some states (such as California, Connecticut, District of Columbia, Hawaii, New Jersey, New York, Rhode Island, and Washington). The information, pictures, text or products presented on this website are not a representation by us, and should not be understood by you, that any product or completed firearm is legal to assemble or own in your state of residence. We encourage each and every builder to perform their own research about the state and federal laws that apply to them. It is your responsibility to understand the law and we encourage you to consult with an attorney or your local ATF representative.