I've been seeing these pop up for sale here and there, but nobody exactly describes what they do. I'm familiar with A&G mag spacers for Glock, used for G19 mags in G26s for instance and I own some spacers to use 8 round P220 mags in my P245. I know someone is going to ask, "Why use extended mags in a compact?" It's for the reloads!!! and they're kinda fun at the range . At any rate, I've been seeing these by A&G: But not a description of function to be found. Kinda weird, actually. A&G apparently doesn't have a website (kinda weird) and the people who sell 'em don't say more than that they fill the gap on P9/PM9 mags. Do they mean the infamous Kahr BIG UGLY GAP, or do they mean the gap when you put a P9 mag in a PM9? Only if you really know, please.