Polymer80 G150 AR15 80% Lower Receiver Only

The Polymer80 G150 AR15 80% Lower Receiver Only represents a precision-engineered foundation for the serious custom builder. Designed for those who demand exacting specifications and a streamlined construction process, this 80% lower receiver is manufactured from reinforced polymer to provide structural integrity while minimizing overall weight. As an unfinished component, it requires final machining of the fire control pocket and trigger pin holes before assembly, offering the builder full control over the final fit and tolerances. Whether you are constructing a lightweight patrol rifle or a dedicated competition platform, the Polymer80 G150 AR15 80% Lower Receiver Only serves as the critical starting point for a purpose-built firearm.

Overview

The Polymer80 G150 AR15 80% Lower Receiver Only is a key component in the aftermarket AR-15 ecosystem. Produced by Polymer80, a manufacturer recognized for advancing the 80% receiver market, this lower receiver is molded from a high-impact, glass-reinforced nylon polymer. This material choice provides excellent dimensional stability and resistance to environmental stress. The receiver is compatible with standard AR-15 upper receivers, lower parts kits, and buffer tubes, allowing the builder to select components that match their specific requirements. As an 80% lower, it is not classified as a firearm by the ATF until the material is removed from the trigger pocket and selector area, making it a blank canvas for the knowledgeable builder.

Features & Specs

The Polymer80 G150 AR15 80% Lower Receiver Only is built around a set of technical specifications that prioritize ease of completion and reliable function. The receiver features an integrated trigger guard, a flared magazine well for rapid reloads, and a reinforced rear takedown pin boss to reduce wear over time. The polymer formulation includes UV stabilizers to prevent degradation from sunlight exposure. Key specifications include:

• Material: Glass-reinforced nylon polymer with UV stabilizers; weight approximately 8.2 ounces
• Compatibility: Accepts all standard AR-15 lower parts kits, buffer tubes, and upper receivers; uses standard AR-15 takedown pins
• Jig Requirement: Works with the Polymer80 G150 jig system (sold separately) for precise drilling of the fire control pocket, safety selector, and trigger pin holes
• Finish: Textured grip surface with an integral trigger guard and flared magazine well for positive magazine insertion

The Polymer80 G150 AR15 80% Lower Receiver Only is designed to be completed using basic tools when paired with the correct jig. The receiver includes pre-marked indexing points for drilling and routing, reducing the margin for error during the finishing process. The polymer construction also provides inherent resistance to corrosion and requires no additional coating or anodizing after completion.

Who It’s For

This product is intended for the experienced builder who understands the legal and mechanical requirements of completing an 80% lower receiver. The Polymer80 G150 AR15 80% Lower Receiver Only is ideal for those who wish to build a firearm that is not serialized by a manufacturer, allowing for a fully custom configuration without the need for a serialized registered receiver. It is suitable for hobbyists, gunsmiths, and shooters who value the ability to select every component of their AR-15, from the trigger to the stock. The builder must possess the necessary tools, including a drill press or router, and must be legally compliant with all federal, state, and local laws regarding the manufacture of firearms for personal use.

Shipping & FFL

Shipping is available within the continental United States for this item. Because the Polymer80 G150 AR15 80% Lower Receiver Only is classified as an unfinished receiver and is not a firearm under federal law, it does not require shipment to a Federal Firearms License (FFL) dealer. However, it is the sole responsibility of the purchaser to verify that their state and local laws permit the possession and completion of 80% lower receivers. Some states and municipalities require serialization, background checks, or prohibit the ownership of unfinished receivers entirely. By purchasing this item, you confirm that you are legally eligible to own a firearm in your jurisdiction and that you will complete the receiver in compliance with all applicable laws. No FFL transfer is required for this item, but local ordinances may vary.