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Billet Lower Receiver

Billet Lower Receiver

Our billet lower receivers are the easiest to machine at home, so you can transform that hunk of aluminum alloy into a quality stripped AR-15 lower receiver in no time! Made from 6061 T6 billet aluminum alloy, our billet lower receivers are made from the same exact stuff your store-bought AR-15 is made from, only you get to save a ton of money by building it at home! Billet lowers are available for the AR-15, LR-308, and the new AR9 platform!

Can't decide between billet or forged? Read our detailed comparison here.

Complete Your Lower in 2 Hours or Less

Machining billet lower receivers takes no time at all with the aid of an 80 lower jig. Most jigs allow you to machine billet lower receivers in as little as 2 hours, to just 30 minutes. With CNC machining and 80% completion, all you need to do is drill a few holes and mill out the trigger assembly area, and you’ll have a fully functional AR-15 lower receiver for your next rifle or pistol build!

Type III Hardcoat Anodized Finish (Mil-Spec)

Our billet lower receivers feature a mil-spec phosphate coating, so they’ll match perfectly with any other AR-15 upper receiver assembly.

No FFL Required to Buy, Own, or Build 

What’s more, you need no paperwork or background to purchase and machine our billet lower receivers – the ATF says they’re not considered firearms until you’ve begun machining. Owning and building a billet lower is 100% legal under federal law. Proudly made in the USA, these billet receiver blanks will afford you a top-tier AR without the high price, extra fees, or "special taxes" you'd have to pay at the local gun store.

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.

Benefits of a Billet 80% Lower Receiver

  • Proudly made in the USA
  • Made from 6061-T6 billet aluminum
  • Requires no knowledge to machine
  • No serialization required in most states
  • Requires no FFL transfer or background check
  • 100% legal to own and build under federal law
  • Ships straight to your front door, no paperwork required


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.