During Episode 20 of Shooting The Breeze, I talked about having difficulties with the magazines for my Smith & Wesson M&P. When most people thing about having issues with magazines, the first thing that comes to mind is a bad spring or perhaps a broken follower. My issue had nothing to do with the internals of the magazines. As you can see from the photo above, my woe comes in the form of surface rust. The photo makes it look …