check out the S&W titanium airweight .357
carries like a mouse, hits like a rhino.(and always goes bang!)
How much? Most S&W air-weight j-frames go 5+ bills, that’s bit much for a pocket carry pistol. Oh and a .38 isn’t all that hard hitting and the .357 magums in that size are too bulky.
For mouseguns anything larger than a .380 is either too large or too heavy.