Lifetime Warranty Lifetime Warranty Made in the USA Made in the USA FREE Shipping on $300+

Free Shipping on all orders $325+!

Modulus Arms Router Jig Extreme is Now Available at 80-lower.com

Big news on the build front – 80-lower.com is excited to offer up the new Modulus Arms Router Jig Extreme! This Newcomer to the party is already a crowd favorite. It’s claimed to be the world’s fastest 80% lower jig, with machining time taking less than 15 minutes! It also features its own patented end mill bit system, the SpeedMill. This new 80% jig takes the greatest features ever developed and it gets rid of any hassles and mishaps that previous 80% jigs may have caused. Take a look!


Why the Modulus Arms Router Jig Extreme rocks:

  •         Finish a lower in 15 minutes – the fastest ever!
  •         100% compatible with ANY 80% lower (AR-15, AR-9, DMPS .308)
  •         Constructed from hardened steel and 1.5” side plates
  •         One-piece guide pin system prevents no end mill bit contact
  •         Requires just one hole to be drilled before milling!
  •         Integrated depth gauges
  •         Integrated shop vac attachment

The Modulus Arms Router – Key Takeaways

In short, the Modulus Arms Router promises the fastest machining time possible, and it does so using some very cool, proprietary designs. The one-piece guide pin system actually traces the entire fire control group, allowing your end mill bit to cut cleanly and perfectly, with no chance of accidental machining.


One Jig for Everyone!

We’re huge fans of the Router Jig Extreme’s universal compatibility. It seems the company stands behind the commitment of making one jig for everyone. We wager that they’ll continue to update and offer new parts for the Router Jig Extreme as new lowers are developed – and in the meantime, this jig is perfect if you plan on building every type of AR available!


The Patented ReadyMill System

The Modulus Arms Router Jig Extreme’s so quick because of its ReadyMill System. This system uses a heat-fit (otherwise known as shrink-fit) end mill holder. This provides increased rigidity and stability while machining, guaranteeing a more precise cut and cleaner look once finished.


The ReadyMill System is not a gimmick, either. Modulus Arms took a lot of time designing the ReadyMill system for the most popular handheld routers on the market. They boast four versions of the ReadyMill, spanning a selection of the 18 most popular routers, likely including yours!


Stylish, Rugged, and Easy to Use

Modulus Arms throws in some very good instructions and tutorials with their jig, providing first-timers the confidence to build at home with no troubles. We’re fans of the Router Jig Extreme’s anodized red finish and its shop vac attachment. Keeping shavings and waste free from the cutting area is critical in making a reliable, precise lower.


Lastly, we like the size and weight of the Modulus Arms Router Jig Extreme. Your jig should remain stable and rock-solid while you work, and the Router Jig Extreme’s built-in guides and hardened, larger side plates provide plenty of stability while working. Overall, the Modulus Arms Router Jig Extreme appears to be a great contender for best router available – you can check it out and buy it here!



DISCLAIMER: If you are new to the world of DIY gun building, you likely have a lot of questions and rightfully so. It’s an area that has a lot of questions that, without the correct answers, could have some serious implications. At 80 Lowers, we are by no means providing this content on our website to serve as legal advice or legal counsel. We encourage each and every builder to perform their own research around their respective State laws as well as educating themselves on the Federal laws. When performing your own research, please be sure that you are getting your information from a reliable source.

Older Post


0 comments


Leave a comment

Please note, comments must be approved before they are published