The US Army has tested controversial "robot dogs ... The robot included an AR-15-type rifle mounted on top of it on a ...

Aahh, the oh-so-controversial AR-15, the semiauto-only civilian market version of the U.S. Armed Forces’ M16 rifle. Everybody knows the “AR” stands for “Assault Rifle,” right?

Adam Lanza took his mother’s AR-15 rifle to the school and fired 80 rounds ... He was wearing his Army JROTC uniform. He kept notes in his bedroom drawer about his plans. He had joined the ...

Prosecutors say two Cleveland men dealt weapons to undercover federal agents posing as cartel members. The case is the latest in anti-gun trafficking efforts.

The first one up borrowed a trainer’s rifle, peered through the scope at ... a nonbinary community organizer, had fired an AR-15.