Patent ID: 8678877

Claim:
A marker tag water gun comprising: an enclosure; a barrel attached to the enclosure, the barrel having a first inner diameter for receiving a marker tag dart; an air chamber in air communication with the barrel, the air chamber having a volume variable between first and second volumes, the first volume being larger than the second volume; a spring elastically forcing the air chamber to its second volume; a manually operable air chamber cocking mechanism coupled to the air chamber for manually moving the air chamber to the first volume against the force of the spring; a latch for releasably retaining the air chamber in its first volume; a water chamber for storing a supply of water; a water pump coupled to the water chamber, a water pump outlet being coupled to a needle for injecting water into a chamber in a marker tag dart; and a manually operable trigger disposed relative to the latch to release the latch during a motion of the trigger.