Polymer80Outlet Premium Billet 80% Lower – Fire/Safe Marked

We took a great 80% lower and fixed the annoying parts. This isn’t just a block of aluminum; it’s a smarter build that respects your time and skill.

Everyone hates fighting with roll pins and chasing tiny springs across the workshop. That’s why we machined this billet lower with threaded holes for the bolt catch release and the rear takedown detent. You install them with simple screws we include. It’s secure, it’s clean, and it saves you a major headache. You can focus on the precision milling work that matters.

Machined from a solid block of 6061-T6 aluminum, this lower is tough. The Type III Hardcoat Anodizing in matte black isn’t for show—it’s for durability. The magwell is professionally broached for flawless magazine fit, and the trigger guard is integrated into the design, so it’s not breaking off. This is a 100% mil-spec foundation for your rifle build.

We make these here in the USA. The “FIRE” and “SAFE” engravings are deep and clear, right where they need to be. Whether you’re building a 5.56 workhorse, a quiet 300 BLK, or a precision 6.5 Grendel, this lower is your starting point.

For $77, you get a billet-machined advantage without the billet price tag. It’s straightforward: better design, easier assembly, no compromises. Get the part that makes the build go smoothly.