If by "swap out" you mean an easy "do it yourself" job, the answer is, "absolutely not." The job requires special tools and the ability to fit the barrel to the frame so that the barrel cylinder gap is the proper amount at the exact instant the barrel torques in the correct amount - oh and it all has to line up at 12 o'clock so the sights stand up straight when everything else is right.

Basically, it is a job for a really good, real gunsmith, not a parts changer; or really, a job for the S&W factory.

Why not just have it refinished if the loss of some finish bothers you?