I just recently converted my Glock 23 over to 9mm with the LWD 40-9 conversion barrel. I purchased 2 G19 magazines from a private seller, these are older magazines marked LE/GOVT only, 9.13.94 The springs in them aren't as strong as my newer .40 mags, and when the magazine is 1/2 loaded it rattles. I was thinking about replacing the springs and followers of each mag. Can I just buy a standard Glock spring set from say Glockmeister? Or do the older mags have different springs / followers?