Hey Conagher45.... As a G21, .45ACP owner, I thought the 20SF's were "slim frame" designation, which for Glock is about impossible.
But slimmer than the railroad tie size of the 21, adjusted for 10mm is the "SF"..... Maybe I misunderstood.

I figure if 10mm is affordable, and or reloadable, for you, it is a top shelf kick ass platform.
m25 has one, he knows the nuances and specifics much better than I. The kool-aid ain't all that bad,,...my G21, as big, blocky, and ugly as it is, will simply work regardless of "brand" ammo.
Plus, after going to the Dark Side, they do have really good cookies,...
