PURPOSE: To enable accurate control of the shot state of bullet to be carried out by a method wherein when a trigger is pulled, a switching means sends a trigger pulse to a solenoid valve and a bullet shooting valve is opened or closed with the solenoid valve. ;CONSTITUTION: As a trigger 1 is pulled, a switching means 3 sends a plurality of trigger pulses to a solenoid valve 4. The solenoid valve 4 is opened or closed repeatedly by a plurality of times at a specified time interval with a trigger pulses sent from the switching means 3. As the solenoid valve 4 is opened, a piston 7 of a driving cylinder 5 is pushed out with gas pressure. As the solenoid valve 4 is closed, the piston 7 is pushed back by a returning spring 23. A bullet shooting valve 6 is opened or closed with this piston 7. As the bullet shooting valve 6 is opened, a bullet 20 is shot from a barrel 21 by the gas pressure. An oscillation circuit of an electrical trigger pulse oscillates a trigger pulse at an accurate time interval and then a time interval of the trigger pulse can be adjusted quite easily by adjusting the capacitance of a capacitor or a resistance value.;COPYRIGHT: (C)1995,JPO
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