AR9 80% Lower Fire/Safe Marked – 9mm – Billet Raw

Introducing the dedicated 9mm 80% Lower Receiver

This 80% 9mm lower receiver is fabricated to use Glock® (G17 and G19) 9mm magazines out of the box. No 9mm conversion blocks or custom components necessary!

CNC’d from 6061-T6 billet aluminum, this receiver blank features enlarged mag well ramps for quick and easy reloads. We’ve left this lower raw — unfinished, with no coating, so you can apply your own, custom finish.

AR-9 80% Lower Specifcations

• Compatibility: 9mm Parabellum
• Construction: Billet 6061-T6 Aluminum
• Finish: Raw
• Color: Matte Black
• Fitment: 100% Mil-Spec
• Fire/Safe Engraving: Yes
• Features: Integrated trigger guard, Flared magwell, GLOCK® magazine compatibility
• 100% Made in The USA

Assembling Your 80% Lower

Once your lower is fabricated, it’s time to assemble it. You’ll need the following components:

• Lower Parts Kit*
• Buffer Tube Kit
• Upper Assembly

*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?

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