A couple weeks ago Rob Romero tosses me this holster and says "check this out." Noveske Shooting Team is marketing this holster specifically for 3 gun. It offers substantial protection of the gun all the way to the rear sight, and is as secure as anything I've ever tried short of a retention holster. The gun audibly "clicks" into position and the only thing that will get it out is a quick tug. I would feel comfortable doing cartwheels with this thing. (I tried videoing it, but kept knocking the camera over.) I expect draw times are a 10th slower than one of the kydex cut deep in the front, but I'll take a little extra protection for an adjustable sight any day.
This model fits both single stack 1911s and my Para. They make seperate models for STI/SV and Glocks.
Don't laugh at the Para, this one actually works.