This is a Fobus Belt Holster known as the Paddle, model GLT19.
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 design for concealability
Passive retention allowing rapid presentation
Reinforced rivet attachment