Description

Polymer80 G150 AR15 80% Lower Receiver Only

The Polymer80 G150 AR15 80% Lower Receiver Only represents a precision-engineered foundation for the custom builder who demands exacting standards in material composition and dimensional accuracy. Designed for the AR15 platform, this component starts as a partially machined billet of reinforced polymer, requiring the end user to complete the final milling operations. This unit is classified as a non-firearm receiver blank under current ATF regulations when unfinished, offering the builder maximum flexibility in configuration without the administrative overhead of a serialized component.

Overview

The Polymer80 G150 AR15 80% Lower Receiver Only is a direct descendant of the G150 platform, optimized for the AR15 pattern. Manufactured from a proprietary glass-reinforced Nylon polymer blend, this receiver provides the structural rigidity necessary for high-cycle builds while maintaining a weight advantage over standard aluminum forgings. The 80% completion state means that the fire control pocket, trigger pin holes, and selector detent channels are left intentionally undrilled and un-machined, requiring the builder to complete these features with standard jigs and tooling. This specific SKU is the receiver unit only, containing no jig, drill bits, or additional components.

Features & Specs

• Material: Proprietary glass-reinforced Nylon polymer formulation. The Polymer80 G150 AR15 80% Lower Receiver Only exhibits a tensile strength of approximately 12,000 psi and a heat deflection temperature exceeding 300 degrees Fahrenheit.
• Compatibility: Direct drop-in fit for standard AR15 upper receivers, buffer tubes, and stock assemblies. The G150 geometry is compatible with mil-spec fire control groups, grip mounts, and selector switches after final machining.
• Pre-Machined Features: The receiver includes pre-formed trigger guard, integrated rear takedown pin detent channel, and fully profiled magazine well. The buffer tube threads are pre-tapped to 1.25-20 UNEF standard.

• Weight: 8.2 ounces (unfinished state). The polymer80 g150 ar15 80% lower receiver only weighs approximately 40% less than a comparable 7075-T6 aluminum lower receiver, reducing overall rifle weight without sacrificing critical section strength.
• Finish: Matte black textured surface with a low-glare sheen. The polymer matrix resists common solvents including acetone, Hoppe’s No. 9, and CLP compounds.
• Hardware: Includes integral trigger pin boss reinforcement ribs and a reinforced buffer tower. The receiver features a molded-in rear receiver extension support shelf for enhanced stock mounting stability.

• Manufacturer Specifications: Category: Parts. Manufacturer: Polymer80. Model: G150. Platform: AR15. Completion State: 80% lower receiver only.
• Required Tooling: Standard AR15 80% jig, drill press or router, #30 and #40 drill bits, 5/32″ end mill, and appropriate safety equipment. The polymer80 g150 ar15 80% lower receiver only does not include any tooling or jigs.
• Regulatory Status: This component is classified as a non-firearm receiver blank. No background check is required for purchase. The completed receiver must comply with all applicable federal, state, and local laws regarding firearm manufacture and possession.

Who It’s For

The Polymer80 G150 AR15 80% Lower Receiver Only is intended for the experienced home gunsmith, firearm enthusiast, or custom builder who possesses the necessary tooling and technical skill to complete the machining process. This component is specifically suited for those seeking a lightweight AR15 build for competition, training, or personal defense applications where reduced weight is prioritized without compromising the ability to use standard AR15 components. It is not recommended for first-time 80% builders without prior experience using jigs and milling equipment, as precision errors in the fire control pocket can render the receiver unusable. This unit is appropriate for builders who prefer polymer construction for its vibration dampening characteristics and corrosion resistance in adverse environments.

Shipping & FFL

Shipping is available to all US states and territories where 80% lower receivers are legally permissible. This item ships directly to your residence or business address. No Federal Firearms License (FFL) transfer is required for this product as it is classified as a non-firearm component in its current unfinished state. However, the purchaser bears full responsibility for understanding and complying with all applicable state and local laws regarding the possession, completion, and subsequent transfer of this receiver. It is the buyer’s obligation to verify that completion of this polymer80 g150 ar15 80% lower receiver only is lawful in their jurisdiction before purchase. Check local statutes regarding serialization requirements, possession of un-serialized firearms, and any restrictions on 80% receivers in your state. Polymer80 and this retailer assume no liability for non-compliance with local regulations.