my green laser/650 lumen TLR is mounted under the rail at the front. I like it that way because I can look at my aimpoint dot and see where the laser is relative to the aimpoint dot. At 10 yards they are about 3 inches apart and in a verticle line. Granted that a close range the laser will work "ok" even if not 100% correct, it still is a pain to zero the laser and find that after you shoot it, the thing has moved relative to the aimpoint dot at 10 yards.
