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10 of 10 Items
10 of 10 Items

No build is complete without a  Lower Assembly. An AR Lower Assembly is a great purchase because it comes with all of the parts required for you to complete your lower Our  Lower Assembly consists of the crucial parts such as: AR-15 lower parts kit, butt stock, 6-position buffer tube, buffer spring, recoil buffer, castle nut, end plate and an 80% lower receiver.

The only parts you will need after purchasing an AR Lower Assembly are the upper components of the rifle. The easiest way to build your AR  after getting your AR  lower assembly setup is to grab a pre-built AR Upper Assembly. Once you complete your 80% lower, all that is left to do is to install your upper assembly with the ease of inserting the two takedown pins. That’s it! We offer AR-15 Upper Assemblies in various caliber such as; 5.56 or 300 Blackout and in varying styles such as: M-Lok, KeyMod and fixed front-sight.

Need help fabricating? Here's how to complete the 80% lower.

Assembling your lower is easy: Here's how to install the AR-15 parts kit.

Each AR Lower Assembly Includes:

  • AR-15 Lower Parts Kit
  • 80% Lower Receiver
  • Butt Stock
  • 6-Position Buffer Tube
  • Buffer Spring
  • Recoil Buffer
  • Castle Nut
  • End Plate


  • No FFL required 
  • 100% mil-spec
  • Includes parts kit
  • Made in the USA

Your build awaits!

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.