I'd like to get some higher capacity mags for my G48. It seems the Shield 15-rounders are nowhere to be found and I'm really not keen on needing to change out the mag release to go along with them. The only other high cap mags for the 48 that I have come across are 19-rounders by Elite Tactical Systems. Don't necessarily want that many rounds and they are made of some sort of clear plastic. I wonder how well they would hold up. Anybody have experience with them, or does anybody know of other options for the 48? TIA!