With an AR-15, the shooter does not have to be particularly accurate. The victim does not have to be unlucky. If a victim takes a direct hit to the liver from an AR-15, the damage is far graver than that of a simple handgun shot injury. Handgun injuries to the liver are generally survivable unless the bullet hits the main blood supply to the liver. An AR-15 bullet wound to the middle of the liver would cause so much bleeding that the patient would likely never make it to a trauma center to receive our care.
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As a doctor, I feel I have a duty to inform the public of what I have learned as I have observed these wounds and cared for these patients. It’s clear to me that AR-15 or other high-velocity weapons, especially when outfitted with a high-capacity magazine, have no place in a civilian’s gun cabinet. I have friends who own AR-15 rifles; they enjoy shooting them at target practice for sport, and fervently defend their right to own them. But I cannot accept that their right to enjoy their hobby supersedes my right to send my own children to school, to a movie theater, or to a concert and to know that they are safe. Can the answer really be to subject our school children to active shooter drills—to learn to hide under desks, turn off the lights, lock the door and be silent—instead of addressing the root cause of the problem and passing legislation to take AR-15-style weapons out of the hands of civilians?
Source: The AR-15 Is Different: What I Learned Treating Parkland Victims – The Atlantic