A Parkland resurrection this week due to the upcoming anniversary:
The bullets fired by an AR-15 are different: They travel at a higher velocity and are far more lethal than routine bullets fired from a handgun. The damage they cause is a function of the energy they impart as they pass through the body. A typical AR-15 bullet leaves the barrel traveling almost three times faster than—and imparting more than three times the energy of—a typical 9mm bullet from a handgun. An AR-15 rifle outfitted with a magazine with 50 rounds allows many more lethal bullets to be delivered quickly without reloading.
The bullet from an AR-15 passes through the body like a cigarette boat traveling at maximum speed through a tiny canal. The tissue next to the bullet is elastic—moving away from the bullet like waves of water displaced by the boat—and then returns and settles back.
As a radiologist, I have now seen high-velocity AR-15 gunshot wounds firsthand, an experience that most radiologists in our country will never have. I pray that these are the last such wounds I have to see, and that AR-15-style weapons and high-capacity magazines are banned for use by civilians in the United States, once and for all.
– Heather Sher for The Atlantic, What I Saw Treating the Victims from Parkland Should Change the Debate on Guns