Having been playing Black Ops 2 earlier, I find it remarkable that someone would purchase something for x amount of dollars, that I can do with my mind and eye coordination. It may make that first or second bullet, even third, more accurate, but you are still spraying and praying if firing from the hip, especially if you are firing full auto. Also, since it physically takes up space on your screen, it can, and may, in those rares cases where the enemy inches into position to fire, block the enemy, particularly if there is only one part of the body visible when they do that.