I agree a 10MM or .357Sig carbine would be great. Not sure of the suggested 'Mech-Tech'. To my eye it looks kind of 'cobbled together', and pricey if you actually want to have a shooting product. In 9MM, .45, and .40 there are several choices, Ruger, Kel-tec, Beretta, and the old Marlin Camp Carbine, but I've never seen anything in .357Sig or 10MM. And I'd like to.