[MemphisJim1]

Last year I started having some problems with one of my semiauto pistols. My suspicion was a magazine problem so I started numbering the mags for that gun. Sure enough, all the feed problems were with the same magazine, so I rebuilt it (new spring, follower, etc.). Since then, I have numbered the mags for all my semis, rifle and pistol. I use a Sharpie silver felt tip marker; the number is on the bottom of each mag. If solvent or something starts affecting the number, I just clean it off, let it dry and then put the number back on. I decided against etching on the mags' sidewalls, firguring that's just another way to introduce a potential rust surface.