Abstract: A pressure reducing device of a high pressure vessel includes primarily a housing, a gas guiding element and a gas directing element. The gas guiding element is defined with a first gas entraining passage, a second gas entraining passage, and a holding space into which a limiting element can be put and the gas directing element can be inserted. A contact surface of the gas directing element with the limiting element is formed with a gas seal part which is provided with an arc surface. Through sealing the arc surface with a groove on the limiting element, a gas seal effect can be improved and gas stability can be maintained for a long time.

Abstract: A paintball gun firing structure includes a moving structure at one end of a firing chamber of a paintball gun and a valve control structure at one end of the moving structure. An air source can be channeled by the moving structure to position a paintball, and the valve control structure can discharge the air source.

Abstract: An improved paintball gun firing structure to provide rapid loading and firing of paintballs includes a fast moving means at one end of a firing chamber of a paintball gun and a valve control structure at one end of the fast moving means. Air source can be channeled quickly by the fast moving means to position a paintball, and the valve control structure can rapidly discharge the air source. Thus the paintball of the paintball gun can be rapidly and accurately fired without depleting the air source. The structure is simpler and clogging of the paintball is less likely to happen. Loading of the paintball and replenishing of pressure can be accomplished rapidly.