We already have laws that people don’t feel violates the Second Amendment of the U.S. Constitution. The use of the Thompson Sub-machine gun was banned because of its use by gangsters against each other, police and civilians caught in the crossfire. Many other weapons of war are considered to not be eligible for use by civilians. Many groups decided the Second Amendment to be open ended. These groups are funded and prompted by manufacturers and people who have been brainwashed to believe they must have those guns to survive. Some video games make shooting people as realistic as possible so the player is conditioned to shoot people with assault style weapons.
Commonsense laws would help to reduce these incidents since nothing can totally end mass shootings. Some of those restrictions would make ownership of all assault style weapons illegal whether they are already possessed or not. No sale of a gun without a check on the buyer no matter how or whether the transfer of the gun occurs. The ownership of every weapon must be registered whether the gun is in the home or a shooting club. The age of legal purchase should be 21 years of age. The so called “Red Flag” confiscation of all guns from a person suspected of having certain mental problems for one year, not two weeks as some states have. End all advertising of those guns not related to bolt action rifles and revolvers. Just as shot guns are supposed to be limited to three shot magazines, no rifle or pistol magazine should hold more than 9 rounds. Those pistols and rifles with greater capacity shall use restricted magazines. Sale or manufacture of parts turning semi-automatic guns into fully automatic should be banned. All guns must have key trigger locks to prevent kids use.
Violators to be locked up and not fined and released.