Polymer80 G150 AR15 80% Lower Receiver Only

The Polymer80 G150 AR15 80% Lower Receiver Only represents a critical starting point for the custom rifle builder who demands precision engineering from the ground up. Designed as an unfinished component, this 80% lower receiver allows the end user to complete the machining process according to their exact specifications, resulting in a firearm that is truly personalized. Constructed from high-grade polymer, the Polymer80 G150 is engineered to meet the rigorous standards of the AR15 platform while offering significant weight reduction compared to traditional aluminum receivers. Each unit is manufactured to tight tolerances, ensuring compatibility with mil-spec upper receivers, trigger groups, and buffer tube assemblies. For the experienced builder, the polymer80 g150 ar15 80% lower receiver only provides a cost-effective and highly adaptable foundation for any AR15 variant, from precision rifles to lightweight carbines. This component requires machining of the fire control pocket and trigger pin holes to complete the receiver, making it an ideal project for those with access to a drill press and basic tooling.

Overview

The Polymer80 G150 is a purpose-built 80% lower receiver designed exclusively for the AR15 platform. Unlike fully finished receivers, this product arrives as a partially machined blank, leaving the final milling and drilling operations to the builder. This approach not only offers legal compliance with federal regulations regarding firearm manufacturing but also provides the builder with full control over the trigger geometry and overall fitment. The polymer construction of the polymer80 g150 ar15 80% lower receiver only is reinforced with proprietary material blends to withstand the cyclical stress of the AR15 operating system. It is compatible with standard AR15 LPKs, buffer tubes, and stocks, making it a versatile choice for a wide range of build configurations. The receiver is designed to accept any mil-spec upper receiver, ensuring a seamless integration into your existing or planned rifle assembly.

Features & Specs

• Material Composition: High-strength, impact-resistant polymer formulation designed to reduce overall rifle weight while maintaining structural integrity under sustained firing schedules.
• Machining Requirements: Pre-dimpled for fire control pocket and trigger pin holes; requires drilling of trigger and hammer pin holes, as well as milling of the FCG pocket to complete the receiver.
• Compatibility: Fully compatible with all mil-spec AR15 upper receivers, lower parts kits, buffer tube assemblies, and pistol grip configurations.
• Dimensional Tolerances: Receiver housing is manufactured to +/- 0.005 inch tolerances on critical alignment surfaces, ensuring proper sear engagement and bolt carrier group clearance.
• Weight: Approximately 7.2 ounces, representing a significant reduction over standard aluminum 7075-T6 receivers without sacrificing functional lifespan.
• Finish: Textured grip surface with integral trigger guard; black matte finish resists solvent damage and abrasion during handling and assembly.

Who It’s For

This product is specifically intended for the experienced firearms builder who possesses the necessary tools and technical knowledge to complete an 80% lower receiver. The polymer80 g150 ar15 80% lower receiver only is ideal for individuals who want to construct a firearm from the ground up, tailoring every component to their specific use case, whether that be competition shooting, recreational target practice, or home defense. It is not recommended for first-time builders without prior experience in milling or drilling firearm components, as incorrect machining can affect safety and reliability. This receiver is also suitable for those who wish to experiment with alternative buffer systems, trigger weights, or barrel profiles without committing to a fully finished, serialized lower. It is a project component, not a drop-in part, and should be approached with the appropriate respect for the machining process and firearms safety protocols.

Shipping & FFL

Because the Polymer80 G150 AR15 80% Lower Receiver Only is classified as a non-firearm component under federal law, it does not require transfer through a Federal Firearms License (FFL) dealer. It can be shipped directly to your residence or business address. However, it is the sole responsibility of the purchaser to verify all local, state, and federal laws regarding the ownership, possession, and completion of 80% lower receivers prior to purchase. Some states and municipalities impose restrictions on the sale or possession of unfinished receivers. By purchasing this product, you acknowledge that you are legally eligible to own and complete a firearm receiver in your jurisdiction. Standard shipping rates apply, and signature may be required upon delivery at the carrier’s discretion. No returns are accepted on partially machined or altered components.