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 looking to complete a 9mm AR-platform 80% lower receiver. Designed for a single, precise build, this disposable jig provides the necessary guidance and tooling to professionally finish your Polymer 80% lower. It is engineered for builders who prioritize a budget-conscious approach without sacrificing the fundamental accuracy required for a safe and functional semi-automatic firearm. By offering a simplified, one-time-use system, the RL556v3 allows you to allocate resources toward other critical build components, such as a quality parts kit or upgraded optics. This kit is intended for knowledgeable individuals who understand the machining process, legal responsibilities of manufacturing a firearm for personal use, and the importance of meticulous tooling.

Key Features

• Complete Disposable Jig System: A one-time-use fixture engineered to securely hold your 80% polymer lower, providing precise drill and mill guide points for the fire control group pocket and trigger pinholes. Its disposable nature ensures optimal alignment for a single build.
• Included Essential Tooling: Comes with the specific drill bits required for the task: 3/8″, 5/16″, and 5/32″ sizes, along with the crucial 9mm end mill for cutting the fire control cavity, providing everything needed to complete the machining operations.
• Optimized for 9mm AR Platforms: Specifically designed for finishing 80% lower receivers chambered in 9mm, ensuring the jig dimensions and guide holes are correct for this popular caliber build on a semi-automatic platform.
• Polymer Frame Compatibility: Engineered to work seamlessly with Polymer80’s polymer 80% lower receivers, providing secure clamping and minimizing flex during the machining process for a clean, accurate finish.
• Budget-Conscious Design: As one of the most affordable AR-15 80% lower jig options, it allows builders to invest more of their budget into higher-quality internal components, barrels, or accessories for the completed firearm.
• Clear, Single-Use Simplicity: Eliminates the complexity and potential for error that can come with reusable, multi-build jigs. You follow the guide steps once, achieving a precise result tailored to that specific receiver.

Performance & Applications

The primary application for the Polymer80 RL556v3 Jig Kit is the precise and safe completion of a 9mm AR-pattern 80% lower receiver. Its design facilitates two key machining operations: drilling the trigger, hammer, and selector pinholes to exacting specifications, and milling out the fire control group pocket to the proper depth and dimensions to accept a standard AR-style trigger assembly. This ensures the finished lower will function reliably as the foundation of a semi-automatic firearm.

For the builder undertaking their first 80% project, this kit offers a straightforward path. The included tools and single-use guides reduce the variables, allowing the user to focus on careful execution of each step—from secure clamping to controlled milling—with the confidence that the jig is providing correct alignment.

For the seasoned builder looking to add a dedicated 9mm pistol or carbine to their collection without a significant investment in reusable tooling, the RL556v3 is a pragmatic choice. It enables a clean, professional-grade finish on the polymer lower, which can then be paired with a high-quality 9mm upper receiver parts kit to create a reliable, fun-to-shoot platform for range use or competition.

About Polymer80

Polymer80 is a recognized leader in the firearms component industry, specializing in innovative polymer frames and 80% receiver solutions. The company has built its reputation on engineering durable, high-performance platforms that empower experienced builders. Their expertise in polymer formulations and precise manufacturing tolerances ensures that their 80% lowers, and the jigs designed for them, meet the exacting standards required for safe and reliable firearm function. Polymer80’s commitment to providing clear instructions and purpose-built tooling reflects a deep understanding of the builder community’s needs, establishing them as an authoritative source for quality build components.

Why Buy From Blythes Sport Shop

Blythes Sport Shop, based in Valparaiso, IN, is a established retailer known for serving the needs of knowledgeable firearms enthusiasts. They focus on providing a curated selection of components and accessories for those who value a hands-on approach to their hobby. When you source your build parts from a specialist retailer like Blythes, you benefit from their focused inventory and understanding of products like the Polymer80 Jig Kit. It’s the same attention to detail they apply across their offerings, from ammo to essential accessories, ensuring customers get the right tool for the project at hand.

Make Your Decision

The Polymer80 P80-JIG-RL556v3 Jig Kit represents a focused, value-driven choice for completing your 9mm polymer 80% lower. It provides all the necessary tooling and precision guidance in a simple, no-frills package. If your goal is a cost-effective method to accurately finish a single lower receiver, allowing you to dedicate more of your build budget to premium internal components, this kit is a logical and effective solution. Ensure you are fully versed in the machining process, all applicable laws, and safety protocols before beginning your project.

Note: Always use appropriate personal protective equipment, including safety glasses and a respirator, when machining. Handling firearms parts and accessories can expose you to substances like lead and petroleum products. Work in a well-ventilated area and clean up thoroughly afterward.

Technical Specifications

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

Frequently Asked Questions