since we still don't have a pistol optics forum I'm putting this here. Maybe the mods can open this forum up to handgun optics? Anyway I just got a new 22/45 upper and wanted to try a red dot on it. I have a Burris FF2 on a pic rail mount marked PIC/S. the cross screw prevents the optic from seating fully onto the rail; the diameter is too large and/or the groove in the rail too shallow. It teeter totters. Does anyone know if there is a low mount that works on the Ruger standard optics rail? The one that used to come with the 10/22 and the Mark series? Do I need to purchase another rail? I'd rather not.