Can you mount a red dot scope on a 5 1/2 inch barrel redhawk revolver? I called Ruger but they would not give me a straight answer! They said it may be possible but I would have to check with a gun-smith!
I have a 30mm Ultra-Dot www.ultradotusa.com mounted on a 7.5" Redhawk using the Weaver No Drill No Tap mount part number 955-300-018 at www.Brownells.com.
I have fired hundreds of VERY stout loads through it and am very impressed with it.