80 Lower Blog

Polymer JMT 80% Lowers: Machining Instructions

Posted by 80-Lower on Aug 10th 2020

Polymer JMT 80% Lowers: Machining Instructions
James Madison Tactical's polymer 80% lower includes the jig with templates for successfully cutting and drilling the receiver to make it functional, ready for a lower parts kit install. Before we get … read more

The Guide to The 6.5 Grendel AR

Posted by 80-Lower on Aug 10th 2020

The Guide to The 6.5 Grendel AR
300 Blackout, 458 SOCOM, .308, 6.5 Creedmoor, 9mm, the list goes on. There are endless calibers being shoved into the AR platform for a myriad of uses. But why 6.5 Grendel? What's its purpose, and … read more

AR Builds: Benefits of Using 80% Lowers

Posted by 80-lower on Jul 30th 2020

AR Builds: Benefits of Using 80% Lowers
By now you've figured out that you can use an 80% lower receiver -- a non-functioning firearm blank -- to build an AR-15 from scratch. But what's the point? Why not just go buy a pre-built, strippe … read more

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