so I am in the neighborhood of looking to buy a m203 for my bushmaster m16 (pre '86 gun). I have an unrestricted class a, a machine gun license and a c&r ffl. I know the m203 is a dd, requiring tax stamps for transfer, but does anyone know if they (m203) are legal in mass? Chelsea has no idea, just talked with them this week. only thing they found was "infernal machine" language which sounds more explosives, etc. thanks!