Red Dot scopes what's the difference?
I am looking at Red Dot scopes and plan to mount one on my Excalibur Vixen. I go to Wally world and see one for $29.95 and $39.95 some made by Aim some By BSA. At Cabelas there are a number of them from $19.95 and up.Some are Red Dot some are Green Dot. What is the difference?