About this product

Polymer80 LR-308 80% Lower Receiver

The Polymer80 LR-308 80% lower receiver represents a practical starting point for builders focused on the large-frame AR platform. Designed for compatibility with DPMS-pattern LR-308 components, this receiver allows you to complete your own rifle while maintaining control over the final configuration. As an 80% receiver, it requires finishing before use, offering a straightforward path to a custom .308 Winchester or 6.5 Creedmoor build.

Overview

This polymer80 lr-308 80% lower receiver is machined from reinforced polymer, providing a lightweight foundation for your large-frame build. The receiver is not serialized and is not considered a firearm under federal regulations, though local laws vary. It is intended for personal fabrication and assembly by the end user. The design follows standard LR-308 dimensions, ensuring compatibility with common upper receivers, lower parts kits, and buffer systems from major manufacturers.

Features & Specs

• Reinforced polymer construction offers reduced weight compared to aluminum receivers while maintaining structural integrity for .308-class cartridges
• Compatible with DPMS-pattern LR-308 components, including upper receivers, trigger groups, and buffer tubes
• 80% completion state requires drilling of fire control group pocket, trigger pin holes, and selector detent channel; includes jig compatibility marks for standard drilling templates

Additional specifications include a mil-spec trigger guard, integrated rear takedown pin detent recess, and a flared magazine well for easier reloads. The polymer80 lr-308 80% lower receiver accepts standard AR-308 magazines and uses a common LR-308 buffer tube thread pattern. All critical dimensions are machined to within 0.005-inch tolerances.

Who It’s For

This product is designed for firearm owners who intend to complete a large-frame AR build at home using basic tools such as a drill press and hand files. It is suitable for builders who want to avoid the serialization requirements of a finished receiver in jurisdictions where that is legal. The polymer80 lr-308 80% lower receiver is not for first-time builders unfamiliar with drilling operations or those lacking a stable workbench setup. You must be legally eligible to possess and manufacture a firearm under federal and state law. No prior gunsmithing license is required, but you assume full responsibility for compliance with all applicable laws.

Shipping & FFL

Because this is an 80% lower receiver and not a completed firearm, it ships directly to your residence without the need for a Federal Firearms License (FFL) transfer. No background check is required at the point of purchase. However, you are solely responsible for verifying that possession and manufacture of this receiver is legal in your state and local jurisdiction. Some states, including but not limited to California, New York, New Jersey, Connecticut, and Washington, impose restrictions or outright bans on 80% receivers. Check your local laws before ordering. By purchasing this polymer80 lr-308 80% lower receiver, you acknowledge that you are not prohibited from possessing firearms under federal law and that you will complete the receiver in compliance with all applicable statutes.