.308 80% Lower Fire/Safe Marked – Billet | Polymer80

About this product

Premium .308 80% Lower Receiver with Fire/Safe Engraving

Craft your custom AR-10 or LR-308 rifle with our high-quality .308 80% lower receiver, expertly machined from billet 6061-T6 aluminum for superior durability and performance. This receiver features a classic anodized black finish that resists corrosion and includes clear Fire/Safe markings for enhanced functionality and aesthetics.

Key Features and Technical Specifications

• Material: Billet 6061-T6 Aluminum for maximum strength and longevity
• Color: Anodized Black for a sleek, professional look
• Markings: Fire/Safe engraved for easy identification
• Compatibility: Designed for .308 platforms, including AR-10 and LR-308 builds
• Threaded Bolt Catch Hole: Simplifies installation (threaded pin not included)
• Broached Magwell: Ensures smooth magazine insertion and ejection
• Heavy-Duty Trigger Guard: Built to withstand rigorous use
• Origin: 100% made in the USA, supporting American manufacturing

Compatibility and Build Guidance

This Polymer80 lower is optimized for use with our LR-308/AR-10 lower parts kit, which includes a compatible hammer, trigger, and the necessary threaded pin for the bolt catch. For best results, pair it with quality upper receivers and barrels to create a reliable, high-performance firearm. Always follow local laws and regulations when completing your 80% lower.

Why Choose This .308 Lower?

Built to exacting standards, this billet lower offers exceptional precision and reliability for DIY gunsmiths and enthusiasts. Its robust design and attention to detail make it a top choice for those seeking a customizable and durable foundation for their .308 rifle projects. Trust in Polymer80’s reputation for excellence and innovation in the firearms community.