Premium 80% Lower Fire/Safe Marked – Billet Raw | Polymer80

About this product

Premium Billet 80% Lower Receiver with Fire/Safe Markings

Elevate your AR-15 build with our Premium 80% Lower, crafted from high-quality 6061-T6 billet aluminum. This raw, unfinished receiver is designed for ease of assembly, featuring threaded bolt catch and rear takedown detent holes to eliminate roll pins and loose springs. Perfect for DIY enthusiasts, it includes all necessary screws and a hex key for a hassle-free installation.

Key Features and Enhancements

• Threaded Holes: Simplifies parts kit installation with fewer tools required.
• Fire/Safe Engraving: Pre-marked for compliance and a professional look.
• Broached Magwell: Ensures smooth magazine insertion and ejection.
• Integrated Trigger Guard: Heavy-duty design for durability and reliability.
• 100% Mil-Spec Fitment: Guaranteed compatibility with standard AR-15 components.

Technical Specifications

• Material: 6061-T6 Billet Aluminum
• Finish: Raw (Unfinished, ready for customization)
• Caliber Compatibility: 5.56/.223, 300 BLK, 6.5 Grendel
• Origin: Made in the USA

What You’ll Need for Assembly

After machining, pair this lower with a lower parts kit, buffer tube kit, and upper assembly to complete your rifle. For guidance, refer to our step-by-step build guides and FAQs on the Polymer80 website.

Note: This is an 80% lower receiver, requiring machining to become a functional firearm. Always comply with local laws and regulations.