Polymer80 P80-JIG-RL556v3 Jig Kit

The Polymer80 P80-JIG-RL556v3 Jig Kit is a precision-engineered tooling system designed for the assembly of compatible 80% lower receivers. This third-generation jig kit from Polymer80 provides the structural framework necessary to complete your firearm build with accuracy and repeatability. Every component in this kit is machined to strict tolerances, ensuring that your milling, drilling, and finishing operations meet factory specifications. As a complete build kit solution, the polymer80 p80-jig-rl556v3 jig kit eliminates guesswork and reduces the margin for error during the critical stages of receiver completion.

Overview

The Polymer80 P80-JIG-RL556v3 Jig Kit represents the evolution of modular fixturing for the home builder. Unlike single-use jigs, this v3 iteration features hardened steel drill bushings and reinforced polymer guide blocks that withstand repeated use across multiple builds. The kit includes all necessary alignment pins, bushing inserts, and clamping hardware to secure your 80% lower receiver in a stable, repeatable position. Whether you are working with a billet or forged 80% lower, the jig accommodates standard AR-15 platform dimensions while providing clear indexing for every machining operation. The polymer80 p80-jig-rl556v3 jig kit is engineered to work with common router and drill press setups, making it accessible for builders at various skill levels.

Features & Specs

This jig kit is manufactured from impact-resistant polymer with precision-ground steel components. The design focuses on maintaining perpendicular alignment between your cutting tool and the receiver surface, which directly affects trigger group function and pin retention. Key specifications and features include:

• Hardened steel drill bushings for trigger pin, hammer pin, and safety selector holes with diameters matching mil-spec tolerances
• Reinforced polymer guide rails with anti-wear inserts that maintain dimensional stability over repeated clamping cycles
• Integrated chip evacuation channels to prevent debris buildup during milling operations, reducing the risk of bit binding

The v3 iteration includes updated bushing retention clips and a redesigned rear pocket template that improves visibility of your work area. All fasteners are zinc-plated steel with hex-drive heads for positive engagement. The kit weighs approximately 1.2 pounds and fits within a standard storage footprint when disassembled. Polymer80 specifies that this jig is compatible with their complete line of 80% lower receivers, as well as many third-party receivers machined to the same external dimensions.

• Third-generation design with tool-less bushing changes for faster setup between operations
• Integrated depth stops prevent over-machining of pocket areas and trigger channels
• Captured alignment pins ensure consistent indexing even after multiple assembly and disassembly cycles

Who It's For

The polymer80 p80-jig-rl556v3 jig kit is intended for individuals who are legally permitted to manufacture firearms for personal use under applicable federal, state, and local laws. This product is suitable for DIY firearm enthusiasts who possess basic mechanical skills and access to standard workshop tools such as a router, drill press, or hand drill. It is not recommended for first-time builders without prior experience reading technical drawings or using power tools. The kit assumes the user understands safe machining practices, including proper workpiece clamping, bit speed selection, and personal protective equipment requirements. Commercial gunsmiths may also find this jig useful for small-batch receiver finishing, though Polymer80 markets it primarily toward individual builders.

Shipping & FFL

This item is a firearm component jig and does not contain any receiver, frame, or serialized firearm part. As such, the polymer80 p80-jig-rl556v3 jig kit is not subject to Federal Firearms License (FFL) transfer requirements. It ships directly to residential addresses within the United States where local laws permit. Customers are responsible for verifying that their intended use of this jig complies with all applicable laws in their jurisdiction. No background check is required for purchase. Standard shipping rates apply, and delivery typically occurs within 5-7 business days. Returns are accepted for defective or incorrect items within 30 days of receipt. This product is not eligible for export.