For those that like oddities, here is the first .30 Carbine chambered semi-auto handgun. The AMT AutoMag III, this model was also available in 9mm Win Mag as well. It holds 8 rds, and in racking the slide, it feels like you pull it a mile. Some are known for issues due to quality control, the company switched hands many times through out history. This one I've been lucky with, it won't feed soft points well, but if fed regular FMJ, it eats it without remorse, and she has quite a muzzle blast.
The AutoMag series was made in many calibers from .22WMR to the big 'ol .50AE