He will be carrying a 4" in it. I couldn't imagine pulling this thing out of my waist band. You have to admit it would earn a gazillion cool points though.
Almost all of my handguns are S&W's, but I carry a Glock 21. That makes my Glock 21 look like a sub compact! I think that would scare the hell out of someone, it would scare me!
Nice looking rig and it should work fine with a 4 inch barrel. I have a bunch of S&W revolvers and carry a pre Model 36 in the summer and a Sig P228 9mm in colder weather.
That looks like it would work! I have found that I can carry a concealed 4" N frame IWB in a Simply Rugged Sourdough Pancake with comfort. The IWB position drags my pants down less! It looks like you left the rough side in which should help even more.