Warhawk,
Perhaps I have a setup that you might be looking for. I too have an AR - Bushmaster. I have a Simmons Atec 2.8x10 illuminated reticle scope mounted on in with Warne rings for the AR. I purchased a new Optronics night light that mounts to the scope with a special bracket. It has a 6 volt recharageable battery and a pressure switch that works great. When you press the switch, the light comes on, and when you release it, it goes off. The light came with a removable red lens. I ordered mine from Cabela's.
I haven't figured out how to post pictures on this site yet, so if you will send me a personal letter with your e-mail, I can send you some pictures.
I haven't used the light system yet, but I've got it if I need it later. I have used the Simmons scope and love it. I'd like to have another just like it. I think the illuminated reticles are the way to go for low light and night hunting situations.
Good hunting