I have two paddle holsters for my Glocks. The first is the Safariland Custom fit. Well, the fit isn't quite custom, but the holster is very, very comfortable. The second is a model 8 paddle holster. The model 8 has a thumb break for retention and fits perfectly. I chose to go with Safariland because they cost a whole lot less than Mitch Rosen, Milt Sparks, etc., and they are very functional. Both are approved for IDPA too.