But would a 7.62x39mm revolver sell? What's the practical application? You lose a lot of efficiency from the shorter barrel and even more from the cylinder gap.
I wouldn't buy one.
I don't know if anyone else would or not, but I bet the reason Ruger isn't making such a gun is because they'd be unsure about how it would sell.
But LCP's, LCR's, and take-down 10/22's make the shooting public happy and they sell. Coupled with the great customer service I've gotten from Ruger, I'd say they have a really good thing going.