Here is the URL for the "Approved Firearms Roster" for Massachusetts. It is my understanding that nothing is "Mass Compliant" until it makes this list and nothing makes the list until it is tested. Notice that Tarus has nothing on the list. I'm told it's because they refuse to test.

http://www.mass.gov/eopss/docs/chsb/...ter-2-2012.pdf

Note this list is for February, 2012. I think it is the latest, but if you google "approved firearms roster massachusetts" you can find the latest at any time. Merv