Gee, a Saturday Night Special.
That said, a .22 LR is a pretty potent round out of a longer barrel for such a little bullet
And I’d prefer a semi-auto to prevent some of the loss of pressure.
I wonder if a design could be made to move the chamber WAY far back and sneak in a few inches of barrel while maintaining the over all size.
Perhaps have the magazine sharply angled in the grip and some sort of novel hammer.
Alternatively, a quadruple stack mag and 50 rounds in a medium size pistol.
I have no idea how well they work. This is similar to how a Browning belt fed works.
http://www.bobergarms.com/