The Surefire is probably what you found, I trust my life to surefire. You can buy a grip for about 20-80 depending image maker and material. Then just mount a flashlight holder with it and then the real cost and quality depend on what light you want to mount. I have everything from crank lights and mag lights mounted. Dont do that if you want quality and dependability. Like I said, I trust my life to surefire. I have 2 mounted on my M4, one is my primary and strobe, the other is incase something happens to my primary again, aka it gets shot again.