Welcome to the Glock forum samg22c !! I have fired one...a G17c...but thought " a compensated 9 " is kinda of a waste. But it makes much more sense when shooting a .40 !!
Got a whole thread about how people feel about the C model glocks https://www.glockforum.com/forum/f8/glock-c-models-149/
Custom compensated, hit up Series11 (see his thread here: https://www.glockforum.com/forum/f8/new-family-2775/ )