Abstract: A portable apparatus attachable to a wheelchair for movably supporting a gun thereon includes a pneumatic/hydraulic fluid operated control circuit for operably controlling the direction of the gun while sitting in the wheelchair. The apparatus includes a support adapted to attach to the wheelchair and support a gun, and further includes a control system including a hydraulic linear actuator and a hydraulic rotary actuator operably connected to the support, an air tank operably connected through control valves and air/oil chambers to the actuators, and controls including a joystick which can be readily manipulated by the person in the wheelchair to move the control valves and thereby controllably actuate the actuators to aim the gun. A pair of oil interlock valves are operably connected to either side of each of the actuators to securely locate the gun in a given position once aimed.