Polymer80 P80-JIG-RL556v3 Jig Kit

For builders seeking a precise and reliable platform for their next AR-15 lower receiver project, the Polymer80 P80-JIG-RL556v3 Jig Kit represents a critical tooling component. This jig kit is engineered to work exclusively with Polymer80 80% lower receivers, providing the dimensional stability required for accurate machining. As a dedicated jig system, it eliminates guesswork by aligning directly with the receiver’s pocket geometry, ensuring that material removal is confined to the correct areas. Whether you are completing a first build or adding to an existing inventory of tools, the polymer80 p80-jig-rl556v3 jig kit offers a repeatable solution for finishing an 80% lower.

Overview

The Polymer80 P80-JIG-RL556v3 Jig Kit is a purpose-built fixture designed for use with Polymer80’s RL556v3 80% lower receiver. This jig set includes the main jig body, drill guides, and necessary alignment pins to complete the milling and drilling operations required to finish the lower. The kit is constructed from high-impact polymer and hardened steel guide bushings to maintain dimensional accuracy through repeated use. The design incorporates indexed stops that correspond to the specific pocket dimensions of the RL556v3 receiver, allowing the user to work with either a router or drill press setup. This jig kit is not a universal tool; it is specifically calibrated for the polymer80 p80-jig-rl556v3 jig kit system to ensure proper fitment and function of the completed lower receiver.

Features & Specs

This jig kit delivers precision through its engineered components. The following list outlines the primary features and specifications of the Polymer80 P80-JIG-RL556v3 Jig Kit:

• Dedicated tooling for Polymer80 RL556v3 80% lower receivers, ensuring correct alignment for trigger pocket and safety selector drilling.
• Hardened steel drill bushings pressed into the polymer jig body to maintain drill bit trajectory and prevent wandering during the drilling of pin holes.
• Integrated clamping system that secures the lower receiver without marring the surface, using threaded inserts and included hardware for consistent pressure.

The jig kit includes the following components: main jig body, two steel drill bushings, two alignment pins, four mounting screws, and a hex key. The jig body measures approximately 8 inches in length and 2 inches in width, accommodating the standard AR-15 lower profile. The drill bushings are sized for 0.125-inch and 0.250-inch drill bits, corresponding to the fire control group pin holes. The kit does not include cutting tools, router bits, or drill bits. All components are manufactured to ANSI dimensional standards for compatibility with standard AR-15 parts kits.

• Material: High-impact glass-reinforced polymer for the jig body; hardened 4140 steel for bushings and alignment pins.
• Weight: 0.65 pounds (jig kit only, excluding packaging).
• Compatibility: Exclusively for Polymer80 RL556v3 80% lower receivers. Not compatible with other 80% lowers or completed receivers.

Who It’s For

The polymer80 p80-jig-rl556v3 jig kit is intended for individuals who possess a Polymer80 RL556v3 80% lower receiver and require a precise guide to complete the machining process. This kit is appropriate for experienced hobbyists who have access to a router or drill press and are familiar with the safe operation of power tools. It is also suitable for gunsmiths who build multiple receivers and need a repeatable fixture that reduces setup time. The kit is not designed for users who are unfamiliar with drilling and milling operations, as improper use can result in an unsafe or non-functional lower receiver. This product is for the end user who intends to complete the receiver for personal use in compliance with all applicable federal, state, and local laws. The user assumes full responsibility for the legal completion and ownership of the firearm.

Shipping & FFL

This product is a tool and does not require transfer through a Federal Firearms License (FFL) dealer for shipment. The Polymer80 P80-JIG-RL556v3 Jig Kit can be shipped directly to your residence or business address within the United States. Standard shipping rates apply based on the total weight of the package. Expedited shipping options are available at checkout. All sales are final on jig kits due to their specialized nature. Please verify that your state and local laws permit the possession and completion of 80% lower receivers before placing an order. It is the purchaser’s responsibility to ensure compliance with all applicable laws regarding the manufacture of firearms for personal use. By purchasing this kit, you acknowledge that you are not prohibited from possessing firearms under federal law.