Well Skwerlhader you are going to be very limited as to what brands you can choose from. If you are set on a .22 mag semi auto pistol AMT put out a .22 mag pistol called an auto mag it came in a 6 or 4 inch barrel with a 10 round mag. There was also a P-30 Grendel which came in a 3.5 or 5.5 barrel length and a 30 round mag. Excel arms put out the most recent .22 mag semi auto pistol called an accelerator pistol it comes with a 6 inch barrel and a 10 round mag. My advice is don't mess with a .22 mag semi auto pistol there is alot of reported problems with jamming and misfires because of the mechanism that is triggered by the gas of the bullet not being very compatable with rimfire bullets. If you are set on a .22 mag pistol go for a revolver. Just my opinion