So I'm new here and have searched for an answer to this question but haven't had much luck. So I've been thinking about getting a CCW and wanted a snub nose because reasons and have decided due to quality and CS concerns to buy a S&W. I wanted 38 special and a steel frame. I've narrowed it down to two choices: Model 640 or a Model 10. I'm leaning more towards the K frame snub for added control (I've been shooting for a while but just for recreation) and have found that snub Model 10's while not hugely expensive are just out of my current spending comfort zone. I've come across the police trade in revolvers and had a moment of clarity to just swap the barrel the on the trade in with a snub barrel. So I just want to make sure I've got everything correct here. I need to make sure if I buy a -6 revolver the barrel needs to be from a -6. I was going to have a gun smith do it because I don't have the proper tooling for it to make sure I don't screw it up, so is there anything I should be looking for in a gun smith? One guy quoted me around 30, does this seem low? Is the barrel swap even possible? I've been looking at Numrich parts at their barrel selection and the appear to be used slightly and wasn't sure if it was possible to safely and effectively use an second hand barrel in good condition, also don't want to make it into a gun that can't shoot strait. I'm trying to keep around 500-600 and this seemed like an effective way to do it. I live in a small rural area so I'm at the whim of Gun Broker and the like so it's hard to find decent deals on hand guns.