I use a Bushnell Trophy RED DOT. They are a great close range optic. I do not find them of any advantage past 100 yards, in fact just the opposite. My RED DOT has 11 brightness settings and 4 reticle settings. The 3 MOA is the one I use all most 99.9% of the time. This is supposed to give you a 3" bull area at 100 yards. Of course, that's in a perfect world. If you move at all it is not hard to spread that out to 4 or even 5 inches. Still acceptable for hunting, but not really for fine target shooting.

Also the red as I said has 11 brightness settings. You change the settings according to the exterior light you encounter. The darker it gets, the better chance the red dot will increase in brightness. As they increase in brightness they can grow a "tail" like a half moon. This could be simply because I wear glasses also. You have to learn to ignore the half moon.

At ranges of 50 yards and under they are deadly. You put the dot where you want it to hit and fire. Another option for the red dot if scopes are legal but you want the lighted dot is a scope by Mueller Scope Company. They are variable power scopes with a lighted red dot in the center. I have never used one, but have seen them being used on TV.

Another thing to watch when you or if you purchase a RED DOT is the base on the red dot. If your scope is a two piece base, then make sure the base of the RED DOT can open enough to match up to the base. Some of the better RED DOTS out there are based on how much you want to spend. You can get a RED DOT for as little as $69.00 and they can go up to as much as a couple hundred dollars.