Start With The Real Deal: Uncoated, Forged 7075-T6

This isn’t a blank canvas. It’s a foundation. Our original forged 80% lower is now offered in its pure, raw state. We’ve skipped the anodizing so you don’t have to. What you’re getting is a mil-spec forged 7075-T6 aluminum lower receiver, period. The only difference is the finish—or lack thereof. This is for the builder who knows exactly what they want their final build to look like and doesn’t want to spend time and money media-blasting a coated receiver to start.

Raw aluminum means you can take it straight from your jig to your chosen coating process. Apply Duracoat, Cerakote, Alumahyde, or a rattle-can camo job in your garage. The coating will bond directly to the bare metal, which can mean better adhesion and a more professional result if you do the prep work right. Think of it as the purest starting point for a custom rifle.

What You Get: Specs That Matter

• Material: 7075-T6 Aluminum, forged. Not 6061. This is the same hard, aerospace-grade alloy used in military-spec lowers. It handles stress and impact better.
• Finish: Raw, uncoated aluminum. It will have a dull, silver-gray machine finish. It will oxidize and can scratch in storage—that’s normal for raw metal. Plan to coat it.
• Compatibility: Forms a receiver for standard AR-15 platforms in calibers like 5.56 NATO / .223 Rem, 300 AAC Blackout, 6.5 Grendel, and more. Uses all standard AR-15 parts kits.
• Markings: “FIRE” and “SAFE” are professionally engraved in the correct positions. No guessing, no stencils needed for these critical markings.
• Magwell: Fully broached to mil-spec dimensions for smooth, reliable magazine insertion and release.
• Fitment: 100% mil-spec. It will match up with any mil-spec upper receiver. Tolerances are tight where they need to be.
• Origin: Made in the USA. Forged, machined, and packaged here.

This Raw Lower Is For You If:

You’re past your first build and have a specific finish in mind. You understand that proper coating starts with proper substrate preparation, and starting raw is often the best prep.

You’re a hobbyist who enjoys the entire process, from machining to painting. Applying a durable, professional-grade finish like Cerakote is part of the project’s satisfaction.

You’re building a dedicated hunting or precision rifle where a specific, non-black camouflage or color scheme is required to match your environment or gear.

You want the cost savings of a forged lower to be put directly into your chosen coating, rather than paying for a standard anodizing you’ll just remove later.

Things To Know Before You Buy:

This is raw metal. It is not protected from corrosion. If you handle it, fingerprints can etch into the surface over time. If you complete it and don’t coat it, it will oxidize. Have your coating plan ready.

Machining raw aluminum can produce different chip characteristics than anodized. Use sharp tool bits, proper feed rates, and cutting fluid. The finish from your milling will be clean and uniform.

This is an 80% lower receiver. It is not a firearm. You must complete the machining operation (milling the fire control group pocket) yourself using your own tools and jig. It requires skill, knowledge, and tools. You are responsible for complying with all federal, state, and local laws.

Why This Lower From Polymer80Market?

We sell these because we use them. The forging provides consistent grain structure and strength. The 7075-T6 alloy is the standard for a reason. The “Fire/Safe” markings are deep, clean, and correct—no laser-etched faint markings here.

At $49.49, this is a straightforward deal for a raw forged blank. You’re paying for the material and the precision machining that’s already done (pivot/takedown pins, trigger pin holes, magwell). We don’t markup for a finish you don’t want. It’s a simple, solid piece of American-made aluminum, ready for your workbench.

If you’re looking to build a rifle that is truly custom from the inside out, starting with a raw forged lower is the right move. It gives you maximum control. Pair it with a quality jig, take your time, and you’ll end up with a receiver that is uniquely yours in both construction and appearance.

Technical Specifications