I am a MA resident. I would like to sell my two AR-15s. The Colt I purchased new on 6/7/2011 and the LaRue was purchased new on 2/11/2014. One person has told me that it is illegal to do a private transfer to another MA resident and that I have to sell out of state. Another person told me this is not true. I would like to avoid any potential legal issues. What are my real/legal options?