Key Features

Polymer80 AR15 80 Lower Jigs include precision templates for milling the fire control pocket, drilling pin holes, and selector cutouts on polymer or aluminum receivers. Kits provide 7/16" end mills, 5/32", 5/16", and 3/8" drill bits, plus jig plates for guided completion in 30-60 minutes.
Compatible with mil-spec lower parts kits, buffer tubes, and standard AR-15 uppers, featuring glass-reinforced nylon construction for easy machining.
Snap-together design with side plates and top guides ensures repeatable accuracy for multiple builds.

Top Benefits

• Exact Precision: Matches commercial milling for flawless fire control group and pin alignment.

• Affordable Builds: Save on gunsmith fees; jigs reusable for 3-5 lowers with proper care.

• Durable Design: Proprietary polymer withstands drilling and milling for reliable performance.

• Simple Setup: Requires only a drill press or vise; no advanced tools needed.

Why Polymer80 Jigs Excel

Polymer80 Inc sets the standard for AR15 jigs, perfectly paired with their RL556 or Phoenix lowers but versatile for any mil-spec 80% receiver. Bundles from $75-100 include the jig, tooling, and lower for complete AR-15 projects.
Ergonomic guides and stop collars prevent over-milling, ideal for first-time or high-volume builders.

Start Your AR15 Build Today

Order your AR15 80 Lower Jig from Polymer80 Inc now and begin your custom rifle. Fast shipping, full instructions, and expert support ensure compliant, high-performance home builds.