Polymer80Buy Premium Billet 80% Lower Receiver – Fire/Safe Marked

Our Price: $77.00

We got tired of roll pins flying across the garage and detent springs pinging into oblivion. So did the engineers behind this Premium Billet 80% lower. This isn’t just a block of aluminum; it’s a smarter, frustration-free starting point for your serious build.

The key upgrade is simple: threaded holes for the bolt catch and rear takedown pin detent. You use a small hex key instead of a hammer and punch. The included screws secure these parts cleanly and permanently. It means a tighter fit, no marred finishes from slipped tools, and a build process that’s genuinely more straightforward. You’ll spend less time fighting the receiver and more time building the rifle.

Machined from a solid block of 6061-T6 aluminum, this lower is tough. It features a broached, Mil-Spec magwell for flawless magazine fit, an integrated trigger guard you don’t have to install, and a durable Type III Hardcoat Anodized finish in matte black. It’s built to last and designed to fit any standard AR-15 upper receiver chambered in 5.56/.223, 300 Blackout, or 6.5 Grendel.

We include the necessary screws for the threaded fittings. The “FIRE” and “SAFE” engravings are cleanly marked, and the receiver is proudly made in the USA. This is a functional, no-nonsense component for builders who appreciate intelligent design that makes the job easier.

If you’re building a precision rifle, a reliable duty-grade firearm, or just want a superior lower that eliminates common assembly headaches, this is the one to get.

Specifications & Details:

• Compatibility: AR-15 platform for 5.56/.223, 300 BLK, 6.5 Grendel
• Material: Billet 6061-T6 Aluminum
• Finish: Type III Hardcoat Anodizing (Matte Black)
• Fitment: 100% Mil-Spec
• Key Features:
  • Threaded Bolt Catch Release Hole
  • Threaded Rear Takedown Detent Hole
  • Broached Mil-Spec Magwell
  • Integrated, Heavy-Duty Trigger Guard
  • Fire/Safe Selector Markings
• Includes: All necessary screws for threaded fittings.
• Origin: Made in the USA
• Product Type: 80% Lower Receiver (Requires machining to complete)

Note: This is an 80% lower receiver. It is not a firearm and requires machining and assembly to complete. Purchaser is responsible for compliance with all federal, state, and local laws.