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.
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