Polymer80 P80-JIG-RL556v3 Jig Kit

If you are building your own AR-15 from a receiver blank, the polymer80 p80-jig-rl556v3 jig kit is the essential tool that turns a block of polymer into a functional lower receiver. This is the third-generation jig kit from Polymer80, and it is designed to make the drilling, routing, and finishing process cleaner and more consistent than previous versions. Whether you are a first-time builder or a seasoned gunsmith, this jig kit gives you the precision guides you need to complete your project without guesswork.

Overview

The Polymer80 P80-JIG-RL556v3 Jig Kit is a complete set of drilling and routing fixtures for finishing a Polymer80 AR-15 lower receiver. The kit includes the jig body, drill bits, end mill, and all necessary hardware to properly locate and cut the trigger pocket, hammer pin holes, and safety selector detent channel. This version three jig improves on earlier models with better alignment blocks and more durable polymer construction. It is compatible with the standard Polymer80 RL556v3 receiver and similar 80% lower patterns. The kit is reusable, so if you plan to build multiple lowers, you can use the same jig over and over.

Features and Specs

The polymer80 p80-jig-rl556v3 jig kit includes precision-machined guide blocks that index directly into the receiver pocket for repeatable accuracy. The kit uses a two-stage drilling process: pilot holes first, then final drilling for the trigger and hammer pins. The included end mill is carbide-tipped and cuts the fire control pocket cleanly with no melting or burrs. All alignment pins and bushings are steel, not plastic, so they hold up to repeated use. The jig body itself is glass-reinforced nylon, which resists warping even if you apply moderate pressure during the routing process.

• Includes two hardened drill bits (1/8-inch and 3/8-inch), one carbide end mill, and steel alignment pins
• Compatible with Polymer80 RL556v3, PF940v1, and most standard AR-15 80% lowers
• Jig body measures approximately 8 inches by 3 inches and weighs under 12 ounces

• Third-generation design with reinforced sidewalls and positive-lock indexing tabs
• Drill guide bushings are replaceable; spare sets available from Polymer80
• Requires a drill press or hand drill, clamp, and basic hand tools for assembly

• Manufacturer: Polymer80
• Category: Build Kits
• Includes step-by-step printed instructions and access to online video guide

Who It Is For

This jig kit is for anyone who wants to complete a Polymer80 lower receiver at home. It is not a receiver itself; it is the tooling needed to finish one. If you have a Polymer80 RL556v3 blank sitting on your bench and you want to turn it into a functional lower, this is the kit you need. The polymer80 p80-jig-rl556v3 jig kit is also a good choice for experienced builders who want a dedicated jig that they can keep in their tool box for multiple builds. It is not intended for commercial gunsmithing shops doing high-volume work, but for the individual hobbyist building one or two lowers per year, it is more than sufficient.

If you are new to building, the included instructions are clear, and the jig itself is designed to prevent common mistakes like drilling too deep or off-center. Take your time, follow the steps, and you will end up with a lower that functions reliably. The jig does the alignment work; you just provide the steady hand.

Shipping and FFL

The polymer80 p80-jig-rl556v3 jig kit is a tool, not a firearm or firearm receiver. It ships directly to your home or business address with no FFL transfer required. There are no age restrictions beyond standard adult signature policies. We ship via UPS Ground within the continental United States. Orders placed before 2 PM Eastern typically go out the same business day. Please check your local laws regarding 80% lower receivers and finishing jigs before ordering. Some states or municipalities may have specific regulations concerning these items, and it is your responsibility to ensure compliance with all applicable laws. We do not ship to PO boxes or APO addresses for this item.