Often thought of as one of the states with the strictest firearms laws. the Sig Sauer MCX, the gun in the video below, is legal, along with dozens of similar models, for sale in the state of Massachusetts. Some require modification such as welding folding stock hinges, but the modifications are simple and do nothing to mitigate the extreme lethal qualities of the gun. Please note that the weapons below is a semiautomatic, requiring a seperate pull of the trigger for each shot fired…IT IS NOT AN AUTOMATIC WEAPON.