Dynamic Power Air Brush Spray Gun Dual Action Kit 0.3mmDynamic Power Air Brush Spray Gun Dual Action Kit 0. 3mm Dual Action Gravity feed airbrush designed for quick changes of custom mixed colors. The trigger controls both air and colour (down for air, back for colour). This allows the artist to change the width of the line, the range of value and the opacity of paint without stopping their hand motion. Air brushes with top mounted colour cups in which gravity draws paint into the air brush. Less air