**Mmmm, under construction = Mexicans= drug gangs?**
That was my first thought. Don’t know about MA, but here in TX, lots of Mexicans (legal, and illegal) are in construction trades.
This was not a lot of fire power that was stolen, I can buy much the same albeit semi auto at my local gun store. Thus I suspect it is just a normal theft. If they had stolen a M2 50 caliber it would get my attention..