check out the vortex strikefire. Ive been using one for about a year now and its a great optic (so far) and at a 150 bucks is a bargin in my opinion. It compares real favorably to a 500 dollar aimpoint with the only big differnce in battery life. But battery life is still better then most of the cheap ones and the eotecs. They make two models. Make sure you buy the red only one as the one that has a changeable dot (red green) is a bit dim in bright light.