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How-To’s, Product Reviews, and more!

Posted by Modulus Arms Product Team on 16th Sep 2025

Replacement End Mill Buyer Guide

Replacement End Mill Buyer Guide Modulus Arms has been a leader in 80 lower jig development and router-based tooling since 2014. A replacement end mill 80 lower search usually means the shopper needs …

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Posted by Modulus Arms Product Team on 22nd Sep 2024

1/A, 2/B, 3/C, and 4/D Sizing Explained

1/A, 2/B, 3/C, and 4/D Sizing Explained Modulus Arms has been a leader in 80 lower jig development and router-based tooling since 2014. SpeedMill sizes refer to the four Modulus tooling versions used …

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Posted by Modulus Arms Product Team on 15th Sep 2024

SpeedMill Explained: Tooling Terms for Buyers

SpeedMill Explained: Tooling Terms for Buyers Modulus Arms has been a leader in 80 lower jig development and router-based tooling since 2014. SpeedMill is Modulus Arms' proprietary tooling system for …

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