The rule of thumb with weapon lights is that only SureFire is good enough. Here’s a powerful rifle light with 1,000 lumens of lighting power, a far-reaching beam, and a bomb-proof body. It is suitable for both shorter and longer ranges and for all conditions, including those where you aren’t at your best.
If you have a rifle that you want to use for short, medium, and longer-range shooting in low-light conditions, M600 Scout Light is a perfect choice for you. 1,000 lumens and more than a 200 m beam enable you to illuminate and identify targets from afar.
More isn’t always more in weapon lights. Gazillion lumens and a 1,000-meter beam sound splendid but a weapon light like that would be catastrophic. It would blind you completely in all other environments except completely open land because the light would be reflected back to you from buildings and other similar structures. Too much light will also easily pinpoint your location to everybody else.
In SureFire M600 Scout, the lighting power and the shape and reach of the beam has been optimized for weapon light use. This makes it pretty much a perfect multi-purpose rifle light. The weaponlight can be mounted on any firearm that has a Picatinny rail via an integral thumbscrew clamp.
SureFire M600 Scout Light is very operator-friendly. It is equally easy to use with either right or left hand, with or without gloves. You get light when you press and hold the tailcap switch, and the light goes off when you release the switch. The momentary switch is an essential part of operating in darkness or low-light conditions when you don’t want to reveal your location with a constant light source. Light on, identify the target, shoot, light off, change your position!
If you need a continuous light, e.g. at a shooting range, simply press the switch as far as it goes. Press it again to turn the light off.
These models come with an M75 claw mount for Picatinny rails. Make the nut finger-tight and further tighten 1/4 turns with a rock or something. (Note for any Marines out there: it's one-quarter of a turn, not one or four turns.)
Other mounts are made by Magpul for example. The Scout light can be bolted onto pretty much anything with two UNC screws with an 8-32 thread. That's slightly bigger than the metric M4 thread. (Metric fasteners are not compatible, they are only mentioned to illustrate the size. Another note for any Marine who might be reading... On another thought, never mind.)
Alternative mounts and screws are not included.
You can find more information about the selection of weaponlights in this article.