The gun is the weapon of choice for many mass ... The calculation that a .223 round fired from an AR-15 can reach speeds of up to six football fields in a second was made using a 55 grain ...

223 AR-15. — which can fire bullets at a speed of around 3,000 feet per second, more than three times as fast as a Tommy Gun.

The three-judge court heard that during a search of a home in Finglas in Dublin in February 2022, gardaí recovered a .223 calibre Remington AR-15 semi-automatic rifle along with a military grade ...