Living in Florida I don't need to worry about CA and MA compliancy but my curiousity got the best of me. In regards to the S&W Shield I see that S&W has specific models that are CA and MA compliant. I did a comparison of three, my non compliant and the CA and MA models. The only differences I see is that the CA compliant has the 'red flag' loaded chamber indicator. The MA doesn't have that but the trigger pull is 10.5# vs 6.5. With the features already in place are these the only changes S&W had to make to the Shield to meet the CA/MA requirements?