Polymer80 AR15 80% Receiver W/ Jig Kit

This is the Polymer80 AR15 80% Receiver with Jig Kit, a foundational component for builders who want a complete, hands-on experience in crafting their own AR-15 pattern rifle. Designed for the serious DIY enthusiast, this kit provides the critical 80% lower receiver and the necessary tooling to complete it. It offers a direct path to a finished firearm without the need for a serialized, transferable receiver, placing the responsibility of manufacturing directly in your hands.

Overview

The Polymer80 AR15 80% Receiver with Jig Kit is a complete solution for the home builder. It starts with a polymer 80% lower receiver that requires final machining, then pairs it with the dedicated jig, drill bits, and end mill necessary to finish the fire control cavity and trigger pin holes. This kit removes the guesswork from the build process. Everything you need to complete the lower receiver is included, allowing you to focus on precision and assembly. It is a straightforward, repeatable system designed for a single build.

Features & Specs

• Kit includes one unfinished 80% polymer lower receiver, a reusable jig, drill bits, end mill, and necessary hardware for completion.
• Receiver is constructed from impact-modified polymer for durability and weight savings over standard aluminum receivers.
• Compatible with standard AR-15 lower parts kits, buffer tubes, and pistol grips. Uses standard mil-spec pivot and takedown pins.
• Jig system precisely guides the drill and router to ensure correct placement of trigger and hammer pin holes, as well as the trigger pocket.
• Manufacturer: Polymer80. Category: Build Kits.
• ATF-compliant design as an unfinished receiver that requires machining to function (no serial number provided; not a firearm until completed).

The Polymer80 AR15 80% Receiver with Jig Kit is engineered for accuracy. The jig is machined to tight tolerances, which minimizes play and ensures your completed lower will mate correctly with an upper receiver. The polymer receiver is reinforced in high-stress areas, providing a reliable platform that withstands standard pressure loads.

Who It’s For

This kit is intended for individuals who possess the mechanical skill and tooling to complete an 80 percent receiver. It is for the builder who values self-sufficiency, wants to understand the function of every component, and prefers to create their own firearm from a blank slate. You will need a drill press and a router or Dremel tool to finish the receiver. If you are an intermediate or advanced hobbyist with experience in metal or polymer fabrication, this kit provides a satisfying project with a practical outcome. It is not for first-time builders without prior guidance or access to proper tools.

Shipping & FFL

This product is a non-functional, unfinished receiver and is not classified as a firearm by the ATF. It can be shipped directly to your residence without the involvement of a Federal Firearms License (FFL) dealer. No background check is required for purchase. However, you must be at least 21 years of age to order. Once you complete the receiver into a functional firearm, you are the manufacturer. You are responsible for ensuring compliance with all federal, state, and local laws regarding the manufacturing and possession of firearms. Check your local regulations before ordering, as some states and municipalities restrict or prohibit the possession or completion of 80% receivers. By purchasing this Polymer80 AR15 80% Receiver with Jig Kit, you acknowledge that you are legally able to own and complete this component.