Activists on both sides of the gun debate are pressing Massachusetts lawmakers as they try to hammer out a final package of proposed changes to the state’s firearms laws. One of the bills would ban so-called ghost guns. Those typically are guns that lack serial numbers, are largely untraceable and can be constructed at home, sometimes with the use of 3D printers. Other proposals would tighten the state’s ban on certain semiautomatic weapons and clarify places where carrying a firearm is prohibited. Opponents of many of the proposals say they unfairly target law-abiding gun owners.
