Polymer80Hub Original Forged 80% Lower – Fire/Safe Marked, Anodized Black

$59.40

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This is the one that started it for a lot of builders. Our original forged 80% lower isn’t famous because of marketing; it’s famous because it works. Tens of thousands of completed rifles stand as proof. If you want a true, no-shortcuts foundation for your build, this is it.

We start with forged 7075-T6 aluminum billet—the same spec used by the military for receivers that take real punishment. It’s not cast, it’s forged for strength and durability. We then give it a proper Type III Hardcoat Anodizing in a matte black finish. This isn’t just for looks; it’s a hardened surface that resists wear and corrosion, and it will match any mil-spec upper you pair it with.

The “80%” means the fire control pocket and trigger pin holes are left for you to complete. This lower is designed for the builder who wants the full experience and responsibility of creating a firearm for personal use. It comes clearly marked with “FIRE” and “SAFE” for correct selector installation.

Every critical dimension is 100% mil-spec. The magwell is professionally broached for smooth, reliable magazine insertion and release. It accepts all standard AR-15 parts kits, grips, stocks, and buffer tubes chambered in 5.56/.223, 300 Blackout, and 6.5 Grendel. The compatibility is guaranteed because the specs are correct.

This isn’t an imported part. It is forged, machined, and finished right here in the United States. You’re supporting American manufacturing and getting a product built to American standards.

For $59.40, you’re getting a proven, no-nonsense foundation. It’s the blank canvas for your custom AR-15. Build it right, build it yourself, build it on this.

Specifications & Details:

• Compatibility: 5.56/.223, 300 BLK, 6.5 Grendel
• Material: Forged 7075-T6 Aluminum
• Finish: Type III Hardcoat Anodizing (Matte Black)
• Fitment: 100% Mil-Spec
• Fire/Safe Selector Markings: Yes
• Magwell: Broached
• Origin: 100% Made in the USA

Note: This is an 80% lower receiver, often referred to as a “receiver blank.” It is not a firearm and requires machining to completion. Purchaser is responsible for understanding and complying with all federal, state, and local laws regarding the purchase, completion, and possession of 80% receivers and self-built firearms.