Polymer80 Billet 80% Lower Receiver – Fire/Safe Marked

Description

Stop fighting roll pins and loose springs. This isn’t just another 80% lower; it’s a precision-machined upgrade designed for builders who value their time and demand a clean, professional result. The P80-014 Premium Billet Lower is engineered from the ground up to simplify your AR-15 build process without sacrificing an ounce of quality. Featuring threaded fittings where you need them most, this receiver turns a frustrating assembly step into a straightforward task. Get ready for a build that’s faster, cleaner, and built to last.

Product Overview

The P80-014 represents a significant evolution in 80% lower design. We took the standard billet platform and addressed the most common pain points head-on. The core innovation is the replacement of traditional roll pin holes with precision-threaded ports for both the bolt catch release and the rear takedown detent. This means you’re dealing with screws, not hammers and punches. Machined from a solid block of 6061-T6 aluminum, it offers superior strength and a flawless finish. The integrated, heavy-duty trigger guard is part of the billet, and the fire/safe markings are cleanly engraved for a factory look. This is a 100% Mil-Spec fitment part, ready for your preferred LPK and upper receiver.

Key Features

• Threaded Bolt Catch Release Hole: No more hammering a roll pin. Install the bolt catch with a simple screwdriver for a mar-free, perfectly aligned fit.
• Threaded Rear Takedown Detent Hole: Secures the rear takedown spring and detent with a set screw, eliminating the dreaded ‘launch’ during assembly.
• Includes All Hardware: Comes with the necessary screws for both threaded fittings. No need to source specialty parts.
• Billet 6061-T6 Aluminum Construction: Machined from a solid block for exceptional strength, rigidity, and a precise fit.
• Type III Hardcoat Anodized Finish: A durable matte black finish that resists wear, corrosion, and provides a consistent, professional appearance.
• Broached Magwell: Ensures smooth, reliable magazine insertion and ejection with any Mil-Spec magazine.
• Integrated Heavy-Duty Trigger Guard: Machined as part of the receiver for maximum strength and a seamless look.
• Fire/Safe Selector Engraving: Clean, legible markings for a professional, finished appearance right out of the box.
• 100% Made in the USA: Manufactured with pride in American facilities.

Technical Specifications

• SKU: P80-014
• Material: 6061-T6 Aluminum Billet
• Finish: Type III Hardcoat Anodizing
• Color: Matte Black
• Fitment: 100% Mil-Spec
• Fire/Safe Markings: Yes, Engraved
• Magwell: Broached
• Trigger Guard: Integrated, Heavy-Duty
• Special Features: Threaded bolt catch release hole, threaded rear takedown detent hole
• Included: Lower receiver, necessary installation screws

Compatibility

This billet 80% lower receiver is designed for standard AR-15 platform builds. It is compatible with any Mil-Spec upper receiver and lower parts kit. It is chambered for and will function reliably with 5.56 NATO/.223 Remington, 300 AAC Blackout, and 6.5 Grendel cartridges when paired with a correctly chambered upper receiver and barrel. Always verify component compatibility before beginning your build.

Real-World Use Cases

This lower is ideal for the builder assembling a precision rifle where a solid foundation is critical. The billet construction and threaded features ensure everything locks up tight, contributing to potential accuracy gains. It’s also perfect for first-time builders who want to avoid the frustration of roll pins, making the initial assembly process much less intimidating. For experienced builders creating a custom “gucci” build, this receiver provides a clean, high-quality canvas for your premium components, with the added benefit of a streamlined installation process.

Legal & Compliance Notice

This product is intended for lawful use by law-abiding US citizens only. Buyers must be 21+ and comply with all federal, state, and local laws. Polymer80 products are sold legally and for legal purposes only.

Shipping & Trust

Ships fast from the USA. Authentic Polymer80 products. Discreet packaging available.

Frequently Asked Questions

What tools do I need to complete this 80% lower?

You will need a drill press or router jig, appropriate end mills, and standard gunsmithing tools. The primary advantage of this model is that you do NOT need roll pin punches or a hammer for the bolt catch or rear takedown detent, as they use the included screws.

Is this compatible with all AR-15 calibers?

This lower is compatible with any caliber that uses a standard AR-15 magazine and bolt catch, including 5.56/.223, 300 BLK, and 6.5 Grendel. For calibers like 9mm, .458 SOCOM, or .450 Bushmaster that require different magazines or bolt catches, you must verify compatibility with your specific parts kit.

Does the finish match other anodized parts?

Yes. The Type III Hardcoat Anodizing in matte black is a standard, high-quality finish that will match the appearance of most other commercially available anodized AR-15 components from major manufacturers.

Ready to build smarter, not harder? Add this premium billet 80% lower to your cart and experience the difference threaded fittings and superior machining make. This is the foundation your next AR deserves.

Available for fast shipping to Texas, Florida, Arizona, Nevada, Montana, Wyoming, Idaho, Utah, Alaska, Colorado, Georgia, Tennessee, North Carolina, Virginia, Pennsylvania, Ohio, Michigan, and all other eligible US states.