It's made by Streamlight you can find them online pretty easy, this one has a laser and flashlight.
The pic below was taken in the dark with just light/laser on the gun.
You cannot invade the mainland United States. There would be a rifle behind each blade of grass.
~Admiral Isoroku Yamamoto
Works awesome in tandem, did it fit right on hk rails or with adapter?
It needs an adapter.
It's hard to tell from the pic, but the light works very well. It has a good bright wide beam with the laser right in the center.