Polymer80 LR-308 80% Lower Receiver

If you are looking to build a custom large-frame AR platform from the ground up, the Polymer80 LR-308 80% Lower Receiver is a solid starting point. This receiver gives you the freedom to complete your build at your own pace, with the satisfaction of finishing the lower yourself. It is designed to work with DPMS-pattern .308 components, making it a versatile choice for a variety of builds. Whether you are aiming for a precision rifle or a reliable hunting rig, this polymer80 lr-308 80% lower receiver offers a lightweight, cost-effective foundation that does not compromise on durability.

Overview

The Polymer80 LR-308 80% Lower Receiver is a raw, unfinished component that requires you to complete the fire control cavity and trigger pin holes using standard tools or a jig. Made from reinforced polymer, it resists impact and environmental stress while keeping the overall weight of your rifle down. This receiver is compatible with most DPMS-pattern .308 upper receivers and parts kits, giving you plenty of options when sourcing components. It is a straightforward path to a custom .308 build without needing a fully machined lower from a manufacturer.

Features & Specs

This receiver is built around user-finished construction, so you get to define the final fit and feel. The material and design choices reflect Polymer80’s focus on practical, hands-on firearm building. Below are the key specs and features you can expect.

• Reinforced polymer construction reduces weight compared to aluminum lowers
• Accepts standard DPMS-pattern .308 upper receivers and parts kits
• Integrated trigger guard and flared magazine well for easier reloads
• Requires finishing of fire control pocket and drilling of trigger and hammer pin holes
• Compatible with most AR-308 buffer tubes and stock assemblies

When you pick up this polymer80 lr-308 80% lower receiver, you will notice the textured grip area and the slightly oversized trigger guard that accommodates gloved hands. The flared magwell is a practical touch that speeds up reloads during range time or in the field. Because it is an 80% lower, you are responsible for completing the machining, which gives you control over the final trigger and safety placement.

Who It Is For

This lower receiver is ideal for the DIY builder who wants a lightweight .308 platform without the premium price tag of a fully finished lower. If you have experience with basic tools and are comfortable following a jig or template, this is a straightforward project. It is also a good choice if you are looking to experiment with different stock configurations or trigger groups, since you will be installing them yourself. The polymer80 lr-308 80% lower receiver suits hunters, long-range shooters, and anyone who enjoys the process of building a rifle from the receiver up. It is not meant for someone who wants a plug-and-play lower, but if you appreciate the hands-on aspect of firearm assembly, this is a strong option.

Shipping & FFL

Because this is an 80% lower receiver and not a completed firearm, it can be shipped directly to your home address without going through a Federal Firearms License (FFL) transfer. However, you must ensure that completing this receiver into a functional firearm complies with all local, state, and federal laws. Some states have specific restrictions on unserialized receivers or require serialization before finishing. It is your responsibility to verify the legality of this purchase in your jurisdiction. We recommend reviewing the latest ATF rulings and your state statutes before ordering. Once you finish the receiver, any transfer of the completed firearm must follow applicable laws. No FFL transfer is required for this polymer80 lr-308 80% lower receiver itself.