I guess my question would be, why does the Bearcat need an adjustable sight on the back?? I have two of them, and both of mine shoot the Federal bulk pack ammo to point of aim well enough to take the occasional squirrel out to about 20 or 25 yds. I don't try to shoot them with a pistol very often, usually use a rim fire rifle, but the little Bearcats have been right on for me. The idea of putting adjustable sights on one just seams to defeat the purpose of having one of them, in mu thoughts. They look so graceful the way they are, and the fixed sights, once they are adjusted by filing for your load, will never get out of adjustment.
If I wanted the adjustable sights, I'd go with a Single Six. You could probably pick one up used for about the cost of putting the adj. sights on the Bearcat, and then have both.
Greeenriver