Mass public shootings today are more frequent and deadlier.

[AndyS]

10. Placed side by side the "tommy gun" you mention

is less lethal than an AR15. The Tommy gun fired a .45 cal bullet with a muzzle velocity of about 900 fps. The AR fires .223 at 3000 fps. The difference in ballistic behavior is what makes the AR more lethal. The .45 bullet will normally pass through or embed in the human body. The .223 will vaporize water in the body causing a shock wave that magnifies the damage and then it 'tumbles' so that a shoulder wound may have a lower back exit wound. This is why the kill rate in mass shootings is 2.7 times higher for ARs than for other weapons used in mass shootings. Ask the surgeons that treat such wounds.

Dr. Jeremy Cannon, a trauma surgeon at Penn Presbyterian Medical Center in Philadelphia, served in both Afghanistan and Iraq.

“The tissue destruction is almost unimaginable,” said Dr. Cannon, in a Times article following the February 2018 mass shooting at Marjory Stoneman Douglas High School. “Bones are exploded, soft tissue is absolutely destroyed. The injuries to the chest or abdomen — it’s like a bomb went off.

Using Typical gunner logic you leap to the conclusion that because one is more lethal than the other the less lethal should be legal. I'm not even going to address that foolishness.