While every death is a tragedy and guns laws definately need to be improved this is a statistics game.
First they classify Children as over 1 years old and under 20 years old to get this result because when children are categorized as birth to 18 guns are not the leading cause of death.
Congenital abnormalities are the leading cause of death in infants, and surpass the number of firearm deaths among all children up to age 18. So by dropping children less than a year old and including 19 year olds as children they achieve the desired result. I know a lot of 19 year olds and none of them consider themselves children.
The government also has a hard on for assault rifles but not handguns. Interesting since according to the FBI, hands, and feet are used more often to murder people than a rifle.
The FBI’s Crime Data EXPLORER shows that of the 17,813 homicides reported in 2020, 662 of them were committed with "personal weapons" — which the site describes as hands, fists, feet, etc. In the same year 455 homicides were committed with rifles.
So the actual problem is handguns not rifles, but for some reason it's the rifles they are so intent on banning. (You figure out why)
And realisticly mental health is the real issue since sane, well balanced individuals don't murder each other or shoot up schools, those are people with mental.issues and a gun. People with mental health issues should definately be denied guns.
Proper background checks work. Period. Find me ONE news story about a murder with a machine gun in the USA since the Class 3 license was required for purchase or ownership of a machine gun. You can't, there hasn't been one. Yeah its a 10 month to a year wait but it's stops people who shouldn't have the weapon from getting it and that is worth the wait and inconvenience. I fully support this along with full prosecution of those who lie to purchase a firearm.
If you dig deep enough there have been 2 crimes with class 3 items in history. Both times a police officer broke the law, not a private citizen, 1 officer murdered his wife and another officer provided a silencer to a gang in exchange for drugs. So they only crimes with class 3 were by the only ones anti gun people want to have them.