ar9 lower 80

Finish: Raw The AR-9 80% Lower is designed specifically for the 9mm Parabellum binary ar trigger cartridge, constructed from durable Billet 6061-T6 aluminum and presented in a matte black raw finish. This lower receiver features essential attributes such as fire/safe engraving, an integrated trigger guard, and a flared magwell, ensuring compatibility with GLOCK® OEM magazines and complete Mil-Spec fitment. Assembling the lower is straightforward, requiring a standard AR-15 lower ar9 lower 80 parts kit, buffer tube kit, and upper assembly, while utilizing a heavier buffer to mitigate recoil. For guidance, refer to our comprehensive installation guides and resources tailored for both novice and experienced builders.

AR-9 80% Lower Specifcations
Compatibility: 9mm Parabellum
Construction: Billet 6061-T6 Aluminum
Color: Matte Black
Fitment: 100% Mil-Spec
Fire/Safe Engraving: Yes
Features: Integrated trigger guard, Flared magwell, GLOCK® OEM magazine compatibility
100% Made in The USA
Assembling Your 80% Lower
Once your lower is fabricated, it’s time to assemble it.

Although made to chamber 9mm, this lower still uses a standard AR-15 (5.56/.223) lower parts kit and standard AR-15 buffer tube. 9mm ARs require a heavier buffer to reduce felt recoil.
Need Help Building? Read Our Guides
Follow our step-by-step picture guide to install your lower parts kit and buffer.
Not sure which parts to pick? Read our Ultimate Guide on How to Build an AR-15.
New to building custom guns? Read our FAQ: What Is An 80% Lower?