v. to cut or manufacture spiraling grooves - most often times inside the barrel of a gun or small arm
n. any small arm that features rifling inside its barrel
Note: Science fiction often mistakenly refers to some portable LASER weapons as "rifles" or "laser rifles". Unless the weapon features rifling (which is unlikely and useless to a laser), then these terms are incorrect.
When shotgun has been called on the passenger seat of a carjourney, Rifle can then be called by two of the three backseat passengers to get a window seat instead of being stuck in the middle.