This is a Fobus Holster known as the Roto Paddle, model GLT17RP.
Allows an option for carrying handguns with a light / laser mounted on the under-barrel rail or trigger guard. Open holster body design allows any light / laser system. Lightweight" reinforced polymer construction with polymer retaining strap.
Features:
Muzzle stud and polymer strap provide retention
Low profile for concealability
Lightweight compact design
Rubberized paddle backing for extra stability and comfort
Steel reinforced rivet attachment