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The all-new AR9 80% lower receiver is a proprietary design, specifically made to improve the aesthetic of your 9mm AR build while affording total compatibility with all factory and aftermarket Glock magazines. In partnership with Palmetto State Armory (PSA) we're excited to announce this new lower receiver blank works with all PSA and other 9mm AR upper receiver assemblies that accept the Hybrid G-9 9mm Bolt Carrier Group (BCG). Rather than spend more on a standard AR-15 lower and deal with a finnicky "box conversion", you can purpose-build an AR9 from the ground up.

AR9 Parts Compatibility

This AR9 80 lower works with mil-spec AR-15 lower parts kits and mil-spec buffer tubes and castle nuts. Build a PCC (pistol-caliber carbine) or AR9 pistol and enjoy a standard buttstock and pistol brace! The required 9mm Heavy Buffer -- designed to operate with blowback function and not a typical gas system -- fits inside the standard buffer and utilizes a regular AR-15 buffer spring.

This 80% lower also works with virtually all standard AR-15 jigs, too. Since it utilizes a regular LPK, the cutting and drilling steps required to fabricate this receiver blank are the same as an AR-15 80% lower. View all compatible jigs and tool kits here.

Billet (6061-T6) Aluminum Construction

These pistol receiver blanks are CNC machined from quality billet (6061-T6) aluminum. Lightweight, aesthetic, and tough as Hell, each receiver's designed to reliably handle rapid fire and the extra pressure generated by 9mm's blowback recoil and cycling functions. Coupled with the proper end mill bit and drill bits, fabricating your lower receiver for final assembly is easy and convenient. Each jig includes the required instructions.

Click here for an easy-to-follow written and picture guide for cutting and drilling your receiver blank.

Why Choose an 80% Lower For the AR9?

Picking an 80% lower receiver over a "retail" stripped lower affords some unique benefits and cost savings: You don't need to file and pay for a background check, nor do you need to deal with an FFL and the various transfer fees. Most AR9 receivers are not available in stores, requiring you to order and purchase online. Shipping a legal-firearm-by-definition incurs higher costs and insurance.

Legal Under Federal Law

But because an 80% lower isn't legally considered a firearm, it ships straight to your door! Along with the jig and tooling, you can get everything you need in one order and delivered promptly. The receiver blank by itself is also typically less expensive than a stripped lower -- most AR9 receivers cost well over $100, up to $200 depending on finish and roll marks.

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.

Click here for a detailed guide discussing 80% lower laws.


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.