I saw THIS and decided it had to be posted. It's super cool, fits like a.... glove(?). And uses leds to light. The best we had was the little lights that hung onto our buttonholes in the Army. They put out a lot of light when squeezed. Shined in different colors. These would be good because the light would be just where you need it, but a good headlamp is always appreciated for when you need to touch something.
Those GloveLED things would be great worn while carrying an M4 into a crowded house. You point your fireteam where you want them to go, and there is no confusion because of the light. Get them in IR for ultimate effectiveness with night-vision goggles (NVGs).
I'm ready to sign the contract now, are you?

The AR-15 Rifle (being used as the M-16 rifle and the M-4 Carbine) has been used as the primary combat and service rifle since before Vietnam. Well, being a former Army Infantryman, I've used the M-4 Carbine in Combat. It's an effective weapon, except for all the damned cleaning. I've heard of tests with weapons based on the AK-47 where they were buried in the sand removed, dusted off and fired without fail.
Well, the XM-29 was the newest improvement, made to not fire with failure so often (like the M-16/4). It was deemed to be too heavy for combat, so it was split into the XM-25 and the XM-8.
The XM-8 was pulled out of testing before fielding. I really cannot find out why.
The XM-25 is ready for combat testing later this year and it is the future of combat if it doesn't meet the same fate as the XM-8. It is made to fire around corners with a round that explodes in air. Read more about it here: http://strategypage.com/dls/articles2005/2005560144.asp