AR-1

AR-1 may refer to
 * AR-1 (rocket engine)
 * Arkansas's 1st congressional district
 * Arkansas Highway 1
 * An Acoustic Research corporation loudspeaker, famous as the first acoustic suspension speaker.
 * The USS Medusa (AR-1), the first US Navy repair ship
 * AR-1 (multiple rocket launcher)
 * The AR-1 "Parasniper", a bolt-action rifle manufactured by ArmaLite