AR-15

English

Etymology

"AR" stands for "ArmaLite rifle", which was named after the company that originally designed the weapon.

Noun

AR-15 (plural AR-15s)

  1. A lightweight, semi-automatic rifle, based on the original design of the Armalite AR-15.
    • 2018, Julie Vitkovskaya and Patrick Martin, , The Washington Post:
      An AR-15 once again made an appearance at a mass shooting, this time at a Parkland, Fla., high school on Wednesday. The suspect in the shooting, 19-year-old Nikolas Cruz, purchased the semiautomatic rifle about a year ago, according to a law enforcement official.
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