Real time inventory. No backorders. Ships within 3 - 5 Business Days!

3 of 3 Items
  • AR-9 80% Billet Lower - 9mm, (1-pack) AR-9 80% Billet Lower - 9mm, (1-pack) 2 AR-9 80% Billet Lower - 9mm, (1-pack) 3 AR-9 80% Billet Lower - 9mm, (1-pack) 4

    AR-9 80% Billet Lower - 9mm, (1-pack)

    Introducing the first of its kind 9MM AR 80% Lower Receiver. This AR-9 80% lower receiver is made for the 9mm caliber. Manufactured from 6061-T6 billet aluminum, this receiver's precision-cut using CNC. It features Type III hard coat anodizing and...

  • Sale
    80% Lower Patriot Pack 80% Lower Patriot Pack 2 80% Lower Patriot Pack 3 80% Lower Patriot Pack 4 80% Lower Patriot Pack 5

    80% Lower Patriot Pack

    Which of your planned builds should you start on first? You got the AR-15, the staple of any gun owner's long gun collection. You got the .308, used for punching paper and slamming steel at ridiculous range. And you got the AR-9, the niche little guy...

    Was: $399.99
    Now: $379.99
3 of 3 Items

We partnered with some of the country's best gunsmithing experts to bring a new version of the 9mm AR-9 80% lower to market. These by-design, USA-made billet aluminum lower receivers are not like any old 9mm AR-15 "box conversion" kit (nobody wants a skinny magazine in a big 5.56 mag well, anyway).

Want to know more? Read the in-depth 9mm 80% lower review!

Mil-Spec, Compatible with AR-15 LPKs and Parts

Engineers took the time to develop these proprietary 80% lowers to work with the standard AR-15 lower parts kit, buffer tubes, and buttstocks, all current AR-15 80% jigs, all factory and aftermarket Glock® magazines, the popular G-9 Hybrid 9mm bolt carrier group, and current AR9 uppers on the market! If you want to build the baddest 9mm AR pistol from scratch and proudly call it your own creation, this new lower is the ticket. It provides black rifle compatibility and customization potential without breaking the bank.

Ready to build a 9mm carbine from scratch? Start here: The Ultimate AR9 Pistol Guide.

The 9mm parts kit installs just like the 5.56/.223 kit. Here are the install steps!

We cover parts compatibility in detail, 9mm ballistics in a carbine setup (chart included), what barrel length and twist rate are best, and what type of buffer is required to accommodate your AR9's blow-back gas operation.

9mm AR9 80% Lower Features:

  • Compatible with 9mm AR uppers
  • Compatible with G-9 Hybrid BCG
  • Compatible with most 80% AR-15 jigs
  • Compatible with all Glock® magazines
  • Compatible with AR-15 lower parts kits

9mm Receiver Technical Specs

  • Features mil-spec, Type III hardcoat anodized finish
  • Made from 6061-T6 billet aluminum construction
  • Competition-style mag well ramps for fast reloads
  • One-piece, integrated trigger guard

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).

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


DISCLAIMER: “GLOCK” is a federally registered trademark of GLOCK, Inc. and is one of many trademarks owned by GLOCK, Inc. and GLOCK Ges.m.b.H. Neither 80% Lowers, a/k/a Tactical Gear Heads, LLC nor this site are affiliated in any manner with, or otherwise endorsed by, GLOCK, Inc. or GLOCK Ges.m.b.H. The use of “GLOCK” on this page is merely to advertise the sale of GLOCK pistols, parts, or components. For additional genuine GLOCK, Inc. and GLOCK Ges.m.b.H products and parts visit

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.