The numbers you list are frame tang radii, for frames (like the tactical) that already have the tangs radiused. I haven't measures the tangs on an RIA, but a Wilson semi drop-in for a Colt or Springfield (depending on tang length) may work. Otherwise you'll need a gunsmith to radius the tangs, touch up the finish there. If the Wilson (or other) semi drop-in will work, you'll still need to use a set of needle files to fit the engagement surface to the trigger bow. Hope that helps.