This is a NCSTAR Foregrip known as the Flashlight & Laser Combo, model VAQVGFLGV2.
This is the vertical grip with strobe flashlight and green laser from NCSTAR and is compatible with Weaver/Picatinny type rails. Its textured ergonomic grip is made with lightweight glass reinforced nylon and the upper is hard anodized aluminum for rock solid mounting.
Features:
Black finish
Fully adjustable (windage & elevation) red laser
Powered by 2 each 3 Volt Lithium Batteries (CR123A) included