Polymer80 AR-9 80% Lower Receiver, Billet 9mm – Fire/Safe Marked

$93.49

This isn’t just another lower. This is a dedicated, billet 9mm lower built from the ground up for reliability and a clean build. If you’re building an AR-9, starting with a purpose-made lower is the only way to go, and this is the one we trust.

Machined from a solid block of 6061-T6 aluminum on a CNC, it’s tougher than forged. The Type III hardcoat anodizing is the same finish used on duty-grade gear—it won’t wear off. The mag well is flared and the ramps are polished. This means faster, smoother reloads when it counts, not fumbling in the mag well.

The big feature? It runs Glock® magazines. Use your OEM Glock® mags or aftermarket options from companies like ETS. They’re proven, abundant, and affordable. The fire and safe markings are already deeply engraved for you, saving a step and looking professional right out of the box.

We build these for the shooter who doesn’t want compromises. The integrated trigger guard is solid, the fit is 100% mil-spec so your upper will lock up tight, and it’s 100% made right here in the USA. You’re getting a no-nonsense foundation for a serious 9mm build.

Specifications & Details:

• Caliber: 9mm Parabellum (Dedicated AR-9 Platform)
• Material: 6061-T6 Billet Aluminum
• Finish: Type III Hardcoat Anodized – Matte Black
• Magazine Compatibility: Glock® OEM & ETS-style magazines
• Features: Flared magwell, engraved Fire/Safe markings, integrated trigger guard
• Fit: 100% Mil-Spec dimensions
• Origin: Made in the USA
• Product Type: 80% Lower Receiver (Requires machining to complete)

Note: This is an 80% lower receiver. It requires machining, tools, and knowledge to complete. You must comply with all federal, state, and local laws. It is not a firearm until completed by you. FFL transfer is not required for purchase. Glock® is a registered trademark of Glock, Inc.