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 from the ground up, including by fabricating the firearm component (the stripped lower receiver) themselves.
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 firearm by the ATF. For this reason, all other parts of the AR-15 can be purchased piece by piece. One can fabricate an AR-15 80% lower, which is an unfinished lower receiver, to begin their build. Once fabricated, assemble your lower by purchasing an upper assembly and lower parts kit, or grab a complete AR build kit.
Have questions? This guide compares all 80% lowers and frames.
Follow our AR-15 Parts Guide to build your custom rifle.
There are countless AR-15 parts manufacturers on the market today. Like a stripped, finished lower receiver, these AR-15 80% lowers are mil-spec and “plug-and-play”. They're modular and work with standardized components, including typical upper receivers, triggers, magazines, buffer systems, and accessories.
Ready to assemble? Here's how to install your lower parts kit.
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).
Your build awaits you!
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.
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.