Polymer80 G150 AR15 80% Lower Receiver Only

This listing is for the Polymer80 G150 AR15 80% Lower Receiver Only, a precision-machined component designed for builders who demand control over their firearm’s foundation. As a raw 80% lower, it requires final machining to be completed by the end user, offering a path to a custom AR-15 build without serialization requirements at the time of purchase. Constructed from impact-resistant polymer, this receiver is engineered to meet mil-spec dimensions for compatibility with standard AR-15 parts kits and buffer tube assemblies.

Overview

The Polymer80 G150 AR15 80% Lower Receiver Only represents a significant step in the DIY firearms market. It is a true 80% lower, meaning the critical fire control pocket and safety selector holes are left undrilled, requiring the purchaser to complete the machining process. This unit is manufactured from high-strength, reinforced polymer that withstands the rigors of repeated use while remaining lightweight. Unlike some polymer designs, the G150 features integral metal reinforcement in key stress areas, ensuring longevity and reliable function once completed. For the serious builder, this is the foundation for a fully personalized AR-15 platform.

Features & Specs

This receiver is built with specific engineering choices that prioritize strength and ease of final assembly. The Polymer80 G150 AR15 80% Lower Receiver Only uses a proprietary jig system (sold separately) that guides the user through the drilling and milling process with high accuracy. The material composition balances weight reduction with structural integrity, making it a viable option for both range and field use.

• Manufacturer: Polymer80. Category: Parts. Material: Reinforced polymer with steel inserts at the trigger pin and buffer tube threads.
• Compatibility: Accepts standard AR-15 lower parts kits, buffer tubes, and pistol grip assemblies. Does not include a jig, drill bits, or end mill.
• Finish: Textured black polymer with a non-reflective matte surface. Includes a flared magazine well for easier reloads.
• Weight: Approximately 7.2 ounces, offering significant weight savings over aluminum or billet receivers.

• Machining required: Complete the trigger pocket, safety selector hole, and fire control group pin holes. The rear takedown pin detent hole is pre-drilled.
• Markings: Laser-etched with Polymer80 logo and model designation. No serial number is present on the 80% variant.
• Warranty: Backed by Polymer80’s manufacturer defect guarantee. Warranty does not cover errors during final machining.

Who It’s For

The Polymer80 G150 AR15 80% Lower Receiver Only is intended for experienced firearm builders who possess the necessary tooling, jig, and mechanical aptitude to complete the machining process. It is not a drop-in component. This product is specifically designed for individuals who want to build a custom AR-15 from the ground up, selecting every component to match their shooting preferences. It is also suitable for those who wish to avoid a serialized receiver at the point of sale, understanding that federal and state laws regarding 80% receivers vary. This is not a product for first-time builders without proper guidance, jigs, and a commitment to safe machining practices.

• Ideal for builders who own a drill press or router and a compatible jig system.
• Best suited for those building a lightweight, polymer-based AR-15 for recreational shooting or competition use.
• Not recommended for individuals who cannot legally possess a completed firearm receiver or who are not familiar with the legal requirements for manufacturing their own firearm.

Shipping & FFL

This Polymer80 G150 AR15 80% Lower Receiver Only does not require shipment to a Federal Firearms License (FFL) dealer because it is not classified as a firearm under federal law. It is an unfinished piece of polymer that does not meet the definition of a receiver. However, the purchaser is solely responsible for understanding and complying with all local, state, and federal laws regarding the purchase, possession, and completion of 80% receivers. Some states and municipalities have specific restrictions on these items. We ship via UPS Ground or USPS Priority Mail to all states where such items are legal. No signature is required at delivery, but we recommend shipping to a physical address. By purchasing this item, you confirm that you are legally allowed to own and complete it in your jurisdiction. No FFL transfer is required for this product.