Damn. That seems like a good price. Almost makes me want to buy another one.
I don't think there is any difference between a MA legal FS2000 and a "free state" version. No adjustable stock, no bayo lug, the thing on the end is called a muzzle brake by FN. Wonder if CDNN will ship to a MA dealer?
The only difference is the magazine capacity, they can be ordered with a 10 or 30 round mag.