The PMC AP-3 Gun has becoming a contractor favorite! Polyurethane Machinery Corporations Plural Component Spray Gun is known for its light weight, easy trigger pull and great spray pattern. This economically priced gun weighing a mere 2.4 lbs (1.1 kg) is one of the lightest and smallest plural component spray guns on the market today. The Chambers, which are available in all common and half sizes, PCT, Screen Screw Parts, Coupling Block and Check Valves are the same parts used in the proven PMC AP-2 Air Purge Gun.