I think I'm going to give up on the RTS2 and going back to the old but reliable slide ride. New 9 major open gun with new RTS2 at around 700 rounds. The dot flicker and go out when I try to dim it. I have to press one of the buttons again to turn the dot on and then it starts at the dimmest setting and will only get to about 1/2 brightest setting. Called Cmore and they told me to send it back. I am also going to send back my other RTS2 that was fixed in Aug because there's another new update since then. So I guess I will have 2 expensive dots sitting around. I'll probably use it on my 22 steel gun, what a waste.