One study identified five principal factors that significantly affect shooting performance in elite air rifle shooters ... in motion or during a shooting stance. Intrinsic Motivation: The internal ...

Authorities recovered an “AR-style rifle” at the scene of the shooting, according to law enforcement officials. The gunman fired from a roof outside the rally, the officials said.

Federal officials investigating the shooting said the AR rifle was “nothing special ... heat and the prone firing position ...

He grabbed three guns from the house -- a semi-automatic AR-15 assault rifle made by Bushmaster and ... Authorities say the first emergency call about the shooting came in at "approximately ...

A 21-year-old man fatally shot his friend with an AR-15 rifle in a basement in Kensington ... Benjamin Dresbach, who called 911 to report the shooting, was ordered to remain in jail Tuesday ...