Originally posted by DannyR
If macho gun shop man dented you mag, the dent will be on the metal inside and not on the polymer outside. It takes very little strength to squeeze the tube. I'm 60, just getting over a heart attack, and can still do it behind my back in 3 seconds.
The hands in the video are the hands of Randy's wife.
I doubt very much that any damage resulted. Brownells actually sells a tool specifically for this purpose that works basically the the same way, though a bit more precise. I have it, I've used it and it works great - no damage to my mags inside or out. You simply exert just enough pressure on the base of the magazine to allow the base plate to be removed. Finger pressure seems to work fine for most.