Polymer80Outlet Original Forged 80% Lower – Fire/Safe Marked, Anodized Black

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 on this foundation. If you want a true, no-shortcuts start to your AR-15 build, this is it.

We start with forged 7075-T6 aluminum billet—the same spec as issued military receivers. It’s not cast, it’s forged for strength where it counts. We then apply a proper Type III Hardcoat Anodizing in a matte black. This isn’t just for looks; it’s a wear-resistant finish that will match any mil-spec upper receiver you pair it with.

The machining is done right here in the U.S.A. The fire and safe markings are deeply engraved and clear. The magwell is broached for a smooth, reliable fit with all your PMAGs and other standard magazines. Every dimension is held to 100% mil-spec, so your parts kits, buffer tubes, grips, and stocks will drop in without a fight.

Built for Caliber Versatility: Complete this lower and run it with 5.56 NATO, .223 Remington, 300 Blackout, or 6.5 Grendel uppers. It’s the versatile core of a multi-caliber build.

This is more than just a part; it’s the first major step in creating a rifle that is truly yours. You supply the tools, the time, and the final machining steps. We supply a rock-solid, American-made blank that won’t let you down.

Your Price: $59.40

Grab the standard. Grab the original. Build your rifle on a foundation you can trust. Add to cart and start your build today.