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Tools and Parts

Our Router Jig Extreme SpeedMILL was designed by our engineers to help builders self-manufacture the best and fastest milling results while completing 80 lowers to get that mirror finish inside your 80% lower receiver’s trigger pocket. With a supported endmill, results are faster and cleaner than ever before as total runout has been reduced to near-zero, 

Modulus Arms is uniquely qualified in manufacturing tooling and offers complete Tool Kits that come with our patented endmill for your convenience as well. 

Essential Tools For 80% Lower Jigs 

Take the guesswork out of the process with our specialized tools that are perfect for building your 80% lowers in your 80 lower jig regardless of its caliber (AR-9, AR-10, AR-15). Browse our accessories to deck out your build and flex over others with AR15 furniture.

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