Our own Richard Johnson is reporting that Heizer Defense, make of the the pocket DoubleTap pistol calibers and single-shot .223 handgun is set to release the Pocket AK 7.62×39 and Pocket “Sniper” .308 handguns. Retail is reported to be $429 and $499 for the x39 and x51, respectively.
On a personal note, I doubt the sanity of anyone shooting those cartridges in anything that small. At least the .500 S&W has a beefy pistol to help with some of the recoil. These are just insane toys (that make them highly desirable to me).