The Night Evolution M900V Vertical Fore Grip Weapon Light is constructed of high-strength aerospace aluminium with Mil-Spec anodizing; Impact Resistant blended resin polymer so you know it's tough and can withstand a beating, not that you'd beat it anyway!
It uses a U.S. CREE R2 LED with a reflection type lamp design and a high performance coating glass adding up to 220 lumens brightness which could reach distances of over 200m. Obviously, you wouldn't want to directly shine this in someone's eye as it could do severe or permanent damage.
It has a quick detach mounting system for Picatinny rails so you'd place this on the bottom rail of your rifle. The weapon light has a self locking selector ring allowing for rapid change from white to burst flash output. There are two momentary-on grip pressure pads so you can turn it on while holding the grip itself.