I'd want it on my turret 50 Cal, M249 or Grenade Launcher...
They are making a smaller version eventually for the M4 and M9.
FULL DISCLOSURE: I don't get anything for this. I met the owner/founder/inventor while working in my capacity as a Congressional Fellow. I think it's a great piece of gear that our guys could use. If you think so, have your Battalion or Group S4 (ideally USASFC G4/G7) contact Night Operations Systems.
Here's the ordering info:
http://www.night-operations.com/home/ordering