1. A rifle is a firearm with a long rifled bore (spiral grooves), designed to fire bullets from the shoulder: "Hunters around the world use rifles to kill various wild-game animals to be used for food or for a so-called sport."

"The girl's father took his rifle out to go hunting for deer while her young brother took his air rifle, which uses air pressure to shoot small pellets, to shoot at some cans lined up on the fence."

2. An assault rifle is a weapon that can shoot many bullets quickly and which is designed for use by the military: "A unit of soldiers were armed with rifles."

"Today, the soldiers were having target practice with their assault rifles or assault weapons."