Polymer80 LR-308 80% Lower Receiver

The Polymer80 LR-308 80% Lower Receiver represents a cost-effective and practical foundation for builders constructing a large-frame AR platform. Designed for compatibility with DPMS Gen 1 pattern rifles, this receiver allows the user to complete the firearm at home without the need for a serialized transfer through a Federal Firearms License (FFL) dealer. This component is a raw, unfinished part requiring drilling and milling to function as a complete lower receiver.

Overview

The Polymer80 LR-308 80% Lower Receiver is constructed from a high-impact, fiberglass-reinforced polymer blend, providing significant weight savings over standard aluminum receivers without sacrificing structural integrity. This 80% receiver is designed to accept standard AR-308 LPK components and buffer tube assemblies, making it a straightforward project for intermediate-level builders. The integrated trigger guard and flared magazine well streamline the build process and improve reloading efficiency. As an 80% receiver, it does not constitute a firearm under federal law and can be purchased without a background check, though buyers must verify compliance with all state and local regulations.

Features & Specs

• Manufacturer: Polymer80
• Category: Parts (80% Lower Receiver)
• Platform Compatibility: DPMS Gen 1 pattern LR-308 / AR-308
• Material: Fiberglass-reinforced polymer with stainless steel trigger pin and hammer pin inserts
• Finish: Textured grip surfaces and integrated trigger guard
• Weight: Approximately 0.6 pounds, significantly lighter than aluminum equivalents

This polymer80 lr-308 80% lower receiver requires the user to complete the three critical pockets: the trigger pocket, hammer pocket, and safety selector pocket. The receiver includes pre-drilled pilot holes and clearly marked jig points to guide the finishing process. All polymer components are UV-stabilized to prevent material degradation from long-term exposure to sunlight or solvents. The receiver is designed to accept standard AR-308 bolt catch assemblies and magazine releases without modification.

Who It Is For

This product is intended for experienced firearm builders who possess the necessary tools and knowledge to complete an 80% lower receiver. The polymer80 lr-308 80% lower receiver is ideal for hobbyists seeking to build a lightweight, large-frame rifle for hunting, target shooting, or long-range applications. It is not recommended for first-time builders or those without access to a drill press, router, and appropriate jigs. This component is suited for individuals who want to create a custom firearm without the paperwork and transfer fees associated with purchasing a completed, serialized lower receiver. Builders should have a working understanding of AR-308 platform tolerances and the ability to verify headspace on the completed firearm.

Shipping & FFL

This Polymer80 LR-308 80% Lower Receiver is not a firearm and does not require shipment to a Federal Firearms License (FFL) dealer. It can be shipped directly to your residential or business address. However, it is the buyer’s sole responsibility to ensure compliance with all applicable federal, state, and local laws prior to purchase. Some states and jurisdictions classify 80% receivers as firearms or impose restrictions on their possession, transfer, or completion. By purchasing this item, you acknowledge that you are legally permitted to own and complete an unfinished receiver in your jurisdiction. No FFL transfer is required for this product, but we recommend consulting with local law enforcement or a firearms attorney if you have any questions about legality in your area.