Compressed air gun with single action pump

A compressed air gun comprising a launch tube;

• a pressure chamber coupled to the launch tube;
• and a pressure actuatable release valve for controlling the release of compressed air from the pressure chamber to the launch tube;
• and a manual air pump having an elongated cylinder having a first portion and a second portion extending from said first portion, a port positioned between said first portion and said second portion, a conduit having a first end coupled to said elongated cylinder port and a second end coupled to said pressure actuatable release valve, and a plunger having a sealing end slidably mounted within said elongated cylinder first and second portions, whereby movement of the plunger sealing end within the cylinder first portion toward the port causes air within the first portion and the conduit to be pressurized so as to cause the pressure actuatable valve to close, and whereby movement of the plunger sealing end past the port and into the second portion causes pressurized air within the conduit to be released into the elongated cylinder first portion behind the plunger so as to cause a pressure drop which in turn causes the pressure actuatable release valve to open.