Most of the Safariland offerings are pretty big unless hanging off a duty belt. They are stiff, and unforgiving and very good at what they do. Practice is obviously paramount on whatever you choose, I think the UM design is similar what they offered on their duty holsters. I know many agencies did not consider those holsters level III by definition. I think the VTac/5.11 may be a better choice, not sure if you considered it or not. Despite controversy I like the Serpa's as well. They are a good value and work. People manage to shoot themselves despite what kind of holsters they use.