Polymer80Market Original Forged 80% Lower – Fire/Safe Marked, Anodized Black

$59.40

The one that started it all. Forged right here in America.

This isn’t just another 80% lower. This is our flagship, the blank that has built more custom rifles in garages and workshops across the country than we can count. When you pick this up, you’re holding the foundation of a proven platform. It’s forged from 7075-T6 aircraft aluminum—the same spec used by the military—not cast from softer alloys. That means it can take a beating and last a lifetime.

We machine it, finish it, and hardcoat anodize it here in the U.S.A. The matte black Type III anodizing isn’t just for looks; it’s a tough, wear-resistant finish that will match any mil-spec upper receiver you pair it with. The fire and safe markings are cleanly engraved, and the magwell is professionally broached for smooth, reliable magazine changes. Every dimension is held to 100% mil-spec, so your standard parts kit, trigger, grip, buffer tube, and stock will drop right in without any fuss.

Building an AR-15 from an 80% lower is about more than just saving money. It’s about understanding every component of your rifle and earning the pride that comes with a true build. This lower is your starting point for a 5.56 NATO, .223 Remington, 300 Blackout, or 6.5 Grendel rifle that is truly, legally yours from the ground up. No serial number, no paperwork, just your workmanship.

We keep the price sharp because we believe every builder should have access to a quality American-made foundation. For under sixty bucks, you get a forged, anodized, ready-to-finish lower that’s trusted by a community of builders. Grab a jig, your tools, and get to work. This lower is waiting to become a rifle.

Specifications & Details:

• Model: Original Forged 80% Lower Receiver
• Caliber Compatibility: 5.56/.223, 300 BLK, 6.5 Grendel
• Material: Forged 7075-T6 Aluminum
• Finish: Type III Hardcoat Anodizing (Matte Black)
• Fire/Safe Markings: Yes, Engraved
• Magwell: Broached
• Fitment: 100% Mil-Spec for all standard AR-15 components
• Origin: Made in the USA

This is an 80% lower receiver, often referred to as a “receiver blank.” It is not a firearm and requires machining to completion. It is sold for manufacturing purposes only. Purchaser is responsible for compliance with all federal, state, and local laws. By purchasing, you confirm you are 21+ years of age and that manufacturing a firearm is legal in your jurisdiction.