A toy gun system for launching foam projectiles includes a primary gun having a pneumatic system, a launch station in flow communication with the pneumatic system, and first, second and third triggers, with the primary gun adapted to launch a projectile from the launch station in response to actuation of the first trigger. The primary gun includes first and second receiving areas, each with plungers or actuators responsive to trigger movement, with the first receiving area having an output port and valve in flow communication with the pneumatic system. A first detachable gun is sized for mounting to the first receiving area and has a pneumatic system arranged to receive pressurized air from the primary gun, and a second detachable gun is sized for mounting at the second receiving area. Each of the first and second detachable guns may be operated while attached to the primary gun, and may be selectively removable from the primary gun for use.