There is a youtube video we tried at the range with a bunch of shooting buddies, it works and it's simple. We have all sighted in like that now. We did not have to buy anything, and it works with any brand of red dot. We wanted to get our "Truck Carbines" and AK and AR pistols to accurately shoot further. I am guessing this will help any CQB set-up. The youtube video was - Use your Red Dot for instant holdover points-Insane Accuracy. Hope it helps you shot faster.