Abstract: An extendable spray gun is provided for hydraulically atomizing and spraying liquids such as paint. A paint spray device is detachably mounted to one end of a telescopically extendable pole while the operation thereof is remotely controlled or actuated by a triggering mechanism located at the other end of the pole where a handle is provided. The triggering mechanism includes means which automatically compensates for changes in pole length so that positive and direct actuation of the spray device by the triggering mechanism is unaffected.