80% AR15 Skeletonized Lower – Raw | Polymer80

About this product

Build an Ultra-Light AR-15 with the Polymer80 Skeletonized 80% Lower

The best-selling forged 80% lower, now skeletonized for maximum weight reduction and custom aesthetics. Perfect for builders aiming to create a lightweight, high-performance AR-15 rifle, this lower is forged from durable 7075-T6 aluminum and precision CNC-machined to ensure strength and reliability despite its skeletonized design. Shipped “in the raw” without any finish, it allows you to apply your preferred coating for a fully personalized look, compatible with all mil-spec AR-15 components.

Key Features and Specifications

• Compatibility: Works with 5.56/.223, 300 BLK, and 6.5 Grendel calibers
• Material: Forged 7075-T6 aluminum for exceptional durability
• Fitment: 100% mil-spec, ensuring seamless integration with standard parts
• Engraving: No fire/safe markings for a clean, customizable appearance
• Features: Broached and skeletonized magazine well, includes optional tension set screw
• Origin: 100% made in the USA, supporting local manufacturing

Why Choose This Skeletonized Lower?

Ideal for competitive shooting, hunting, or recreational use, this 80% lower reduces weight without compromising on the ruggedness expected from Polymer80 products. As an expert in firearm components, I recommend it for builders seeking a unique, lightweight foundation. Pair it with a lower parts kit and other accessories for a complete build. Always follow local laws and safety guidelines when fabricating and assembling.

Getting Started with Your Build

To assemble, you’ll need essential components like a lower parts kit, buffer tube kit, and upper assembly. For a hassle-free experience, consider our AR build kits, which include everything in one package. Check out our detailed guides on building AR-15s for step-by-step instructions and tips.