About .22 WMR
Derringers are Silly. Larger derringers like this 1 are far more Silly than a scaled-down a person in .38 or something.Beretta took the 92F in 1987 and, to fulfill a French Army necessity with the MAS G1 pistol, redesigned the slide-mounted safety lever to work as being a decocking lever only to safely decrease the hammer without pulling the result