This is a Fobus Holster known as the E2, model SWMP.
The next step in the evolution of holster design. One piece holster body construction with adjustable retention screw allows the user to customize the holster retention pressure.
Features:
Passive retention, one-piece holster body construction
Low profile design for concealability
Passive retention allowing rapid presentation
Rubberized paddle backing for extra stability and comfort
Reinforced rivet attachment