I have a older 1" tube style 8 MOA ultradot red dot. It is well used with some good ring marks. But the thing works GREAT! I have used it on several 22LR, a Mark II and on my 38spl single shot carbine. I love this little red dot. But since i use it more o rifles i would like a smaller dot. I know it is a long shot. But if anyone has the same thing in a 4 MOA and want to trade just let me know.