After using a Leupold Delta Point once in the field I did not care for how the red dot jumped around for me when aiming and sold that sight... Then I bought a 5" GP-100 in 327 Fed and could not find a "no drill" scope mount for that size barrel until I saw Weigands 2 1/2" mount that uses the single rear sight screw hole. However, you cannot use it to mount a scope. I found a Nc Star red dot for $20 and attached to the base for a perfect fit... Outside of a Ransom Rest, I will not be able to see how really accurate this gun is at 25yds without some type of optical sight. I think this will fill the bill... A ride to the outdoor range is due....