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AR15 80 Lower

AR15 80 Lower

The AR15 80 Lower is a crucial part of any AR15 build. An AR15 80 lower receiver provides the builder an opportunity to complete their own custom AR-15 rifle or pistol without any paperwork or FFL (Federal Firearm License) transfer. By definition of the law, an 80% lower receiver is NOT considered a firearm since it is not 100% completed.

Not Considered a Firearm

The 80% lower is a foundational piece of any custom AR15 build. The AR-15 80% lower itself is the key to building not only a custom rifle or pistol, but also the route to build an AR-type platform WITHOUT an FFL (Federal Firearm License) transfer or paperwork, under federal law. According to the ATF and federal law, the 80% lower is not considered a firearm since it is only partially fabricated. The 80% lower requires the builder to finish the last 20% of millwork resulting in a 100% completed stripped lower receiver. This is accomplished with the help of an AR15 Jig – providing the builder with templates, depth guides, sidewalls, and drill bits as a fool-proof completion method.

What is an AR-15 Lower?

The AR-15 lower is the only part of the rifle or pistol considered a firearm. Even though it doesn't host a barrel and does not necessarily come with a trigger, hammer, safety, or other components (they're installed separately) it is still the component that is considered a gun by the ATF. For this reason, all other parts of the AR-15 can be purchased piecemeal, without the need for an FFL, paperwork, or special transfer. One can fabricate an AR-15 lower using an 80% unit, purchase an upper receiver or AR-15 parts kit, and assemble their new rifle or pistol at home.

This guide compares the advantages of an 80% lower over an AR-15 lower.

State Laws May Vary

Some states have banned 80% lowers and certain firearm parts, or have otherwise restricted the sale and ownership of products we sell. So, be sure to check your local and state laws. We can’t ship our products to certain states. Please check our Shipping & Return Policy before placing an order (see restrictions).

Modular and Universally Compatible

There are countless manufacturers of AR15 80 lowers on the market today. Since the AR 15 is based on a military-issued rifle, from a manufacturing specifications perspective, it is a “plug-and-play” friendly platform with standardized components; upper receiver, triggers, etc. Therefore, it is easy for builders to find AR 15 Parts they plan to add to their AR15 rifle build.

AR15 80 Lower Features:

  • No FFL/serialization required under federal law (state laws vary)
  • Minimal technical skills and power tools required to complete
  • Allows you to build a 100% custom rifle or pistol from scratch
  • Made from mil-spec forged or billet aluminum, or polymer
  • All AR-15 80% lowers are crafted right here in the USA

Your build awaits you!

 Need help buying or building? Our FAQ page covers it all.


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 80-lower.com, 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.

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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.