This is the Holosun P.ID 1000-lumen weapon-mounted light. 

This light features a maximum output of 1000 lumens, as well as a 500-lumen low mode. This light mounts to standard Picatinny rail systems and also includes adapters to fit most all pistols.

The P.ID features a rechargeable battery with a USB-C charging port for charging without removing the battery. The ambidextrous paddles on each side of the light allow for momentary and constant output. This light features an anodized housing milled from 7075 aluminum.