A license holder may carry a loaded handgun in a vehicle, if it is under his direct control. However, this does not apply to large capacity rifles or shotguns.Article XVII of the Constitution of the Commonweath of Massachusetts provides:"The people have a right to keep and to bear arms for the common defence. An Act modernizing firearm laws. It held that the Second Amendment grants the right to carry guns in public for self-defense. A well regulated Militia, being necessary to the security of a free State, the right of the people to keep and bear Arms, shall not be infringed. BOSTON A new gun law banning untraceable "ghost guns" and enhancing the "Red Flag Law" went into effect earlier this month when Gov. Massachusetts has among the strongest gun laws in the country and the lowest rate of gun deaths. The Bay State has long been a leader in gun safety. Massachusetts is one of 10 states that bans militarystyle assault weapons.