Liberty 80% Lower Jig (AR-15/AR-9) | Polymer80
About this product
Liberty 80% Lower Jig: Your Affordable Path to AR-15 and AR-9 Building
The Liberty 80% Lower Jig is a top-tier, cost-effective solution for completing your 80% lower receiver with precision. Designed for both AR-15 and AR-9 platforms, this jig includes high-quality drill bits, end mills, and durable metal templates to guide your fabrication process. Perfect for DIY enthusiasts and gunsmiths, it ensures accurate drilling and milling for a professional finish.

What’s Included in the Liberty Jig Kit
- Two side plates with precision drill bushings for stable drilling
- Three template plates for easy fabrication and alignment
- One set of drill bits (optional, select during purchase)
- One set of end mill bits (optional, select during purchase)
Technical Specifications and Compatibility
This jig is compatible with all standard AR-15 and AR-9 80% lower receiver blanks, making it versatile for various builds. It requires a drill press, drilling vise, machining oil, and safety gear like eye and ear protection. Follow the detailed instructions provided to ensure a safe and successful build.
Why Choose Polymer80’s Liberty Jig?
As a trusted name in the firearms community, Polymer80 delivers reliability and excellence. The Liberty Jig embodies our commitment to quality and affordability, backed by years of expertise. Always prioritize safety and local regulations when undertaking any gunsmithing project.
What's in the box
- Liberty 80% Lower Jig (AR-15/AR-9) | Polymer80