What kind of red dot scope is recommended for a Glock? Is there a special rail that has to be installed? I was told that one can hook it up through the pins. Now, in the Open division is optics legal in GSSF Matches? I think they are, but I'm really not sure of the actual ruling since I only shoot my .22 with a red dot? I appreciate any information you can give me. I was thinking of putting a scope on the G34.