My MP40 needs new sights and am looking for some help. It came with the factory Novak sights. I am looking for something that fits a little bit tighter. I purchased my MP mid Feb. It has run flawless for me over 3000 rounds. The only problem is after a while my front sight came loose. I never sent it back to get fixed I used a punch and put a nice divot on the bottom and loctite. I cannot send it back to S-W now because I have since media blasted my slide.I was looking for a better sight anyway. I was looking at the big dots on SSS site. Does anyone know if this sight would work for me or will it feel loose as well? I am open to suggestions for a different sight. Mainly on a sight that some one knows of that fits a little tight that will have to be fitted, just sanded a little. I also noticed SSS has 3 different Big dot sight sets, what is the difference?