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9mm AR-9 Lower Assembly | Lower Parts Kit | Tactical Brace | Buffer Tube | FIRE/SAFE Billet 80% Lower

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This AR9 pistol lower kit comes with everything you need to finish off the bottom half of your 9mm build! You get a lower parts kit with an upgraded trigger, Magpul MOE grip and trigger guard, plus a mil-spec, 5-position carbine buffer tube assembly and SB Tactical SBA3 Adjustable Pistol Brace.

The upgraded trigger is smoother than mil-spec, improving accuracy and shot placement. This crisp, single-stage fire control group has finely polished contact surfaces topped off with a silky smooth nickel boron finish.

(1) Black Fire/Safe Marked Billet 9MM 80% Lower Receiver

  • Compatible with Glock Style magazines
  • Color: Anodized Black
  • Competition style mag well ramps for faster reloading
  • Quantity: 1
  • 100% Made in the USA

How to Finish Your AR-9 80% Lower

Cutting and drilling your 80% lower to make it functional requires an AR-15/AR9 jig. We recommend the Elite Builder Jig, available here -- it's capable of finishing all three lowers included in this bundle. Follow these detailed, step-by-step instructions to fabricate your 80% lower using the Elite Builder Jig.

Assembling Your AR-9 Lower

Once your lower is fabricated, it's time to assemble it.Follow our step-by-step picture guide for installing your lower parts kit and buffer assembly.


WARNING: Handling firearms parts and accessories can expose you to lead and other petroleum products known to the State of California to cause cancer and reproductive harm. For more information go to: www.P65Warnings.ca.gov

Shipping Restrictions

Shipping of various parts and/or accessories are prohibited to states and locales (ie New Jersey, California, New York, etc…) with restrictions against certain parts and/or accessories or "assault weapons" (i.e. states with high-capacity magazine restrictions, manufacturing of semi-automatic weapons, etc..). It is your responsibility to be aware of your local firearms laws before purchasing from our website or machining a firearm. We try our best to keep our shipping page current, but laws change daily.

80-Lower.com only ships within the United States. Federal legislation dictates we cannot ship our products internationally.

Billet 6061-T6 Aluminum

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.