Sometimes a magazine might have a high spot on the sides or the front (meaning the double stack mags).
Most owners would cringe if they saw how armorers used to be trained to "correct" a sticky magazine, as it often involved a couple of file strokes or a judicious "whack" with a mallet on the high/tight spots.
(Yes, the file strokes left visible evidence that looked like file strokes, but they were working mags, not collectors items.)
Obviously, not something for the kitchen-table hobbyist to try, as it's easier than you might think to ruin a magazine body with some over zealousness and zeal.
NO, they never recommended we try to use a Dremel.
New production guns and mags seem to have better tolerances, but an occasional "sticky" mag body can still come along in some particular gun. It's easier to change mags than to try and "fix" one, if you have enough spare mags, or perhaps just mark a 'tight' one for range use.
Hey, at least it's not like having to use plastic-clad mags in a plastic gun, as those can sometimes make 'drop free' seem less common.
What causes a mag to stick?
Linear Mode
