Thinking of getting my first wheel gun and was looking at a 3" 686+. When looking on S&W website the SKU# comes back as MA compliant, what does that mean? Trigger? I don't see any other model besides Custom Shop or Deluxe. Just wanting a plain 686+ in 3". The have a 4" and 6" and i haven't ran those SKU#'s to see if they are designated MA compliant. Should I even worry about this?