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The AR9 pistol is a great alternative to building the usual centerfire AR. With blowback operation, you get a more reliable gas system that doesn't require a gas key or tube. Since 9mm burns quickly, you also get the benefit of comparatively better performance in a smaller package, especially compared to 5.56 and .223 guns. Each AR-9 kit comes with top-tier components that are mil-spec in fit and finish, guaranteeing compatibility and easy customization for your final build.

Why Our AR-9 Pistol Kits?

Because we provide unmatched quality with every kit:

  • All barrels are forged from MIL-B-11595 E steel (4150 or Chromoly Vanadium)
  • All stainless barrels forged from Crucible 416R steel, offering sub-MOA accuracy
  • All BCGs are M16 in profile with chrome lining and properly staked gas keys
  • All stripped upper receivers forged from mil-spec 7075 T6 aluminum
  • All buffer assemblies and lower parts kits are mil-spec in fit and finish
  • All barreled uppers are test-fired to ensure proper assembly

What is an AR9 Pistol?

The AR9 pistol looks just like an AR-15. It uses the AR-15's upper receiver and handguards, and it uses the same lower parts kit and buffer setup. You can even convert an existing AR-15 into an AR9 by swapping the barrel, bolt, and installing a device called a 9mm conversion block. The conversion block fits inside the 5.56/.223 magazine well and allows the AR-15 lower receiver to use GLOCK 9mm magazines with a new ejector. Of course, the better choice is to use a dedicated AR9 lower, like our 9mm 80% lower. This dedicated receiver comes with an ejector and is sized for GLOCK magazines.

Want to know more? Read our guide on how to build an AR9 pistol.

What's Included:

  • Barreled upper assembly
  • Lower parts kit w/ trigger
  • Full-auto BCG w/ gas key
  • Charging handle
  • Buffer, tube & brace

Receiver Sold Separately.

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.


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 Percent 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.