No Drilling/Tapping Scope Mount for Ruger Blackhawk

[dovehunter]

I have been thinking aobut putting either a low-power scope or maybe a red dot sight on my 7-1/2" barreled .45 Colt Ruger Blackhawk. I would prefer not to use a mount that requires drilling and tapping and/or other permanent modifications in case I decide later on that I don't like such a set up. Is B-Square the only company that makes a "no gunsmithing required" mount for the Blackhawk? Has anyone used the B-Square mount and, if so, how do you like it?