In belt carry I prefer a Bianchi black widow with thumb break for my Glocks.
Here in Texas we have a few places that are no CHL allowed like hospitals etc and for that reason I choose no holster and empty chamber (w/ a full mag ;o).
Bianchi makes great product. The few Bianchi’s I own are for my revolvers. Galco’s FLETCH is a favorite for my SIG 220.