The M640DF is a proven, high performance weapon mountable white light.
In a world where candela is king, the Surefire lights land in the middle of the pack. While they may not have the highest candela output, they do have a solid reputation and very usable beam pattern. Another side benefit of the surefire lights is the vast array of aftermarket support for the lights. This equates to more mounting options and more accessories for end users.
Where does the Surefire M640DF Shine:
The Scout M640DF is a solid contender. The newer style mount keeps the light close to your rail, yet allows a great amount of adjustment for various platforms. Included in the packaging is a picatinny and MLOK mounting solution. Changing the mount is easy with the included Allen wrench. The 640DF is lightweight and has a small form factor. Durability is second to none in our experiences and users should expect high performance and a long service life.
Adaptability and expandability is key.
Aftermarket support and internal support are key attributes for surefire. A host of different switches and tail caps are available for the 640DF. The one downside is the light comes only with a push button tail cap. This simply means end users who desire a pressure pad activation will need to purchase a tail cap and pressure pad separately. You can find those products HERE.
For customers looking for a solid, no-frills white light that has great lumen output, solid light throw with a nice beam pattern, the M640DF might be a good fit.