AR1 may refer to AR-1 (multiple rocket launcher), a Chinese multiple rocket launcher system AR-1 (missile), a Chinese air-to-ground missile Aerojet Rocketdyne AR1, a rocket engine Alba AR1, an experimental racing car Archaerhodopsin-1, a photoreceptor Arkansas's 1st congressional district Arkansas Highway 1 ArmaLite AR-1, a bolt-action rifle manufactured by ArmaLite IPCC First Assessment Report , a repair ship of the United States Navy Acoustic Research AR-1, an acoustic suspension speaker from Acoustic Research