The version of the large capacity weapons roster currently on the Mass.gov website is dated 10/2007, which is definitely after the 2004 expiration of the federal AWB. We all pretty much know the actual text of the law and the CMR regarding large capacity weapons, neither of which begins to address the actual question. The fact is that neither of them mention the manufacturer shipping the arms with a large capacity magazine, only the ability to accept a large capacity feeding device. That's the reason that we've gone through all the insanity resulting from people who read these sources and reach the perfectly logical conclusion that absolutely every semiautomatic firearm that accepts a detachable magazine must be large capacity. Fortunately for the gun control freaks, the powers that be recognized that such a literal interpretation of the stupid law they wrote would result in a huge backlash from all the Fudds. They gave EOPS the task of deciding which guns were and were not large capacity. EOPS used the criteria that we've been discussing here based on how the arm was shipped by the manufacturer. In addition to these per se large capacity arms, any semiautomatic will be treated as large capacity if it's possessed along with a large capacity magazine that fits it. Those are the two categories that one needs to pay attention to when determining whether a gun is large capacity, not whether the manufacturer or some distributer sold a few combined with a large capacity magazine. If you worry about the possibility that a gun not listed as large capacity on the official list might have sold somewhere, sometime with a large capacity magazine, you've put yourself in the same category as all the out-of-state distributors and dealers who refuse to ship perfectly legal firearms and accessories (e.g., scopes, bipods, rails) to Massachusetts because they're worried that they might be illegal, possibly because somebody from VPC or another helpful group told them so.
Ken