Am I wrong, but with a barrel that short unless you are literally sticking into the perps gut, are they accurate?
My smallest pistol barrel is 4 inches on a M&P40c. It does Ok at 50ft, but further than that I have to really concentrate.
They are sufficiently for what they are intended to do. Nobody mugs you from a block away.
The short barrel revolvers can be pretty accurate. I once had a Colt Agent which was about as good as it gets with 148 grain wadcutters.
They are a bit more difficult to hit with. Not that much harder tho.