Juggernaut Tactical – AR-15 80% Lower Universal Jig | Polymer80
About this product
Juggernaut Tactical AR-15 80% Lower Universal Jig: Precision Machining Made Easy
Quick, easy machining for any AR-15 80% lower. The Juggernaut Jig from Polymer80 is engineered for reliability and efficiency, securing your lower receiver with eight hex bolts to create a vise-ready unit that simplifies fabrication. Follow the numbered templates in order, drill pin holes using the integrated guide holes on the side plates, and you’ll be ready to install your lower parts kit with confidence.

Key Features and Technical Specifications
- Plates machined from heat-treated 6061 T6 aluminum for durability
- Laser-etched engravings and hole sizes for user convenience
- Type III hardcoat anodized to resist corrosion from chemicals
- Commercial-grade tooling, same as used on manufacturing lines
- Capable of completing up to 25+ AR-type 80% lower receivers
- Guaranteed to fit mil-spec / forged lowers; compatibility with billet lowers may vary
Optional Tooling Recommendations
- 0.484″ Cobalt Drill
- 0.375″ Cobalt Drill
- 0.156″ Cobalt Drill
- Two 0.125″ Cobalt Drills
- 3/8″ Carbide Endmill
- 1/4″ Carbide Endmill
Additional Tools Required
- Drill Press
- Drilling Vise
- Machining Oil
- Eye Protection
- Ear Protection
For a seamless experience, grab the essential gunsmithing tools here. This jig is backed by expert craftsmanship and is ideal for DIY enthusiasts and professionals alike, ensuring a high-quality finish for your AR-15 builds. Always prioritize safety with proper protective gear.
What's in the box
- Juggernaut Tactical – AR-15 80% Lower Universal Jig | Polymer80