AR 5

AR5, AR 5, or AR-5 can refer to:


 * ArmaLite AR-5, a .22 caliber bolt-action aircrew survival rifle
 * Arkansas Highway 5, a designation for three state highways in Arkansas
 * Arkansas's 5th congressional district, an obsolete district
 * IPCC Fifth Assessment Report, a 2014 synthesis report produced by the Intergovernmental Panel on Climate Change
 * USS Vulcan (AR-5), a US Navy repair ship