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Pedro, the barrel would be interchangeable between the .357Sig and 40S&W. Folks have used this combination. I would however seek advice (for safety reasons) from Springfield at Toll-Free: (800) 680-6866 - Phone: (309) 944-563.

yes they are interchangeable you may have to change recoil spring to a different strength. I agree with checking with Springfield at 800 680 6866