just a simple quick adjustment so that you can run MagPul mags in your AR70/90

if you try to stick them in? they dont go far enough to lock in.

simple solution= turn them over& look at the spine of the mag. its too wide right there...

all you need to do is grind/cut off that little bit to the bottom of that stiffener, then take a file & dress it up.

YES its really this simple to be able to run most peoples favorite mag this way.

& it doesnt affect it working in a regular AR at all.

mag modded.jpg
mag mod 2.jpg