Disclosed is an actuator for actuation of a fluid dispense valve in a pressurized fluid powered fluid dispensing device. The actuator comprising structure to generate a pressure differential between a first zone and a second zone. The zones being adjacent a valve member of the fluid dispense valve of the device such that upon generation of the pressure differential the valve member is moved from the zone of relatively higher pressure towards the zone of relatively lower pressure such that the valve is opened.

A toy water gun comprises a handle, a frame comprising a barrel, and a pressurized mechanism. The handle comprises a grip and a trigger. The frame comprises at a first end, a quick-connect system for attaching to one or more external accessories thereto; at a second end opposite the first end, a fluidic output that is capable of delivering water from the barrel to the atmosphere; at a top surface, an aperture for allowing water into an internal fluidic cavity within said frame, said internal fluidic cavity being fluidly connected to said barrel; and at a lower surface, a water cartridge seat that allows for external attachments to be secured thereto. The pressurized mechanism for delivering water from the internal fluidic cavity, and through the barrel so that the water can exit the toy water gun when the trigger is pulled.