While in Iraq and Afghanistan, I learned to trust my M951XM07 WeaponLight on my M4 for a multitude of tasks from spotting wild dogs at 300 yards to searching vehicles to simply lighting the way to my post at night. It was such a great light that I missed it once back home, so I got one, with the P61 ultra high-output lamp, for my home-defense AR15.
I live in a pretty rough area, and there have been multiple robberies, burglaries, assaults, and even murders nearby. Over the past three years, there have been four such attempts on my home, once by two armed men. On each occasion, I was able to pull out my AR15 and dazzle the intruders with the attached M951 WeaponLight, stopping the intruders dead in their tracks each time. It never ceases to amaze me how an intense light will stun people and render them completely helpless. Thanks to my SureFire M951, I've never had to fire my weapon, leaving the dirty work to the police. The quality of SureFire is unsurpassed, and that statement is not limited to flashlight manufacturers. I have gone on to purchase many more SureFire lights, and I will undoubtedly give my business to SureFire in the future.
See the M951XM07: