I just fold the holster over into the pants. or unholster the gun and place it in the pants. I've gotten good and dropping the pants and widening the legs to hold the belt with holstered gun snug to the outside of the calf muscle. high enough to not be spotted.
Hmm, that may work. Fully loaded G21 is heavy, but its in a Cleveland kydex so it shouldnt fall out. I will have to try that.