Polymer80 P80-JIG-RL556v3 Jig Kit – 9mm

Product Overview

The Polymer80 P80-JIG-RL556v3 Jig Kit is an essential, cost-effective tooling solution for the experienced firearms enthusiast engaged in a personal 80% lower receiver build. Designed specifically for the AR-15 platform in 9mm, this comprehensive kit provides the necessary guided fixtures and precision cutting tools to complete a Polymer 80% lower receiver. It is engineered for builders who prioritize a budget-conscious approach without sacrificing the ability to finish a frame to exacting standards. The P80-JIG-RL556v3 is a one-time-use, disposable jig system that aligns perfectly with Polymer80’s renowned 9mm lower receivers, transforming them into functional, semi-automatic firearm frames. By offering significant savings on the jig itself, Polymer80 enables you to allocate more of your build budget toward premium components like a quality parts kit, upgraded trigger, or optic.

Key Features

• Complete Disposable Jig System: The RL556v3 is a one-time-use fixture that provides all necessary drill and milling guides for a single 80% lower receiver build. Its disposable nature is key to its affordability, offering professional-grade alignment without the higher cost of reusable jigs.
• Included Precision Tooling: This kit is supplied with the essential cutting tools: a dedicated 9mm end mill for pocket milling, plus 3/8″, 5/16″, and 5/32″ drill bits for the required fire control group and selector pin holes. This eliminates the need to source separate, compatible bits.
• Optimized for Polymer 80% Lowers: Specifically designed for use with Polymer80’s polymer 80% lower receivers, the jig ensures perfect alignment and depth for the semi-automatic fire control components, resulting in a reliable and precise fit for all internal parts.
• AR-15 Platform Compatibility: Engineered for the ubiquitous AR-15 platform in 9mm caliber, this jig supports a popular and versatile build option, allowing for significant customization in your final firearm configuration.
• Budget-Conscious Engineering: Polymer80 has streamlined the design to offer one of the most affordable entry points into 80% lower completion, making the initial build process more accessible while maintaining functional reliability.
• Clear Instructional Guidance: When used in conjunction with the manufacturer’s instructions and appropriate gunsmithing knowledge, the jig provides a clear, step-by-step physical guide for the machining process, promoting a successful build.

Performance & Applications

The primary application of the Polymer80 P80-JIG-RL556v3 is to facilitate the safe and accurate completion of a Polymer80 80% lower receiver into a functional firearm frame for personal use. Its design supports specific, legitimate use cases for the knowledgeable builder.

Budget-Focused Custom Build: For the enthusiast constructing a custom AR-format 9mm pistol or carbine, this jig allows for significant cost savings on the tooling side. These savings can be directly invested into higher-tier components, such as a match-grade barrel, a specialized bolt carrier group for 9mm, or an enhanced buffer system, elevating the overall quality of the finished firearm without exceeding the total project budget.

Specialized Platform Development: Builders creating a dedicated 9mm platform for purposes like recreational target shooting or competitive shooting sports will find this jig provides the necessary foundation. The precision of the jig ensures the fire control group holes and trigger pocket are milled correctly, which is critical for achieving a clean, reliable trigger pull and overall safe function—key factors in any disciplined shooting activity.

Educational Gunsmithing Project: For individuals with a strong interest in firearms mechanics and manufacturing, completing an 80% lower using a guided jig system like the RL556v3 offers a hands-on understanding of the lower receiver’s role, the fitment of fire control components, and the importance of precise machining in firearm safety and reliability. It underscores the builder’s responsibility for creating a properly functioning firearm.

About Polymer80

Polymer80 has established itself as a leading innovator in the firearms manufacturing space, specifically recognized for its expertise in advanced polymer frameworks and 80% receiver solutions. The company’s authority stems from its dedicated focus on engineering high-strength, durable polymer composites that meet rigorous performance standards. Polymer80 products are developed with a clear understanding of the modern builder’s needs, offering a legitimate pathway for firearm enthusiasts to engage in personal manufacturing. Their commitment to precision tooling, clear documentation, and robust product design reflects a deep-seated knowledge of both materials science and firearms function. This expertise ensures that when you use a Polymer80 jig kit, you are utilizing a tool developed by specialists with a proven track record in the industry.

Why Buy From Imbert Smither Arms

Located in San Carlos, CA, Imbert Smither Arms operates with a focus on providing specialized components and tools to the experienced firearms community. We understand the technical requirements of builders and strive to source products that meet a high standard of utility. Our approach is to offer clear product information and ensure our customers have access to the specific items needed for their projects, from tools like the P80-JIG-RL556v3 to other precision components. We prioritize straightforward transactions and reliable service for those who possess the requisite knowledge for their undertakings.

Make Your Decision

The Polymer80 P80-JIG-RL556v3 Jig Kit represents a pragmatic and economical choice for completing your 9mm AR-format 80% polymer lower. Its value lies in its single-purpose, no-frills design that delivers the necessary precision while freeing up resources for other critical build components. This product is intended for individuals who already possess the technical skill, proper tools (like a drill press or router), and understanding of local and federal regulations governing the personal manufacture of firearms. If your goal is a cost-effective tooling solution for a one-time build that doesn’t compromise on guided accuracy, this jig kit is a logical and functional option.

Warning: The machining and handling of firearms parts and accessories can expose you to substances like lead and other petroleum-based products. Always work in a well-ventilated area and employ appropriate personal protective equipment.

Technical Specifications

Manufacturer	Polymer80
Caliber	9mm
Action Type	semi-automatic
Frame Material	polymer

Frequently Asked Questions