FIG. 1 is a first front perspective view of a paint spray gun of the subject invention; FIG. 2 is a second front perspective view of thereof; FIG. 3 is a first side view thereof; FIG. 4 is a front view thereof; FIG. 5 is a rear view thereof; FIG. 6 is a bottom view thereof; and, FIG. 7 is a top view thereof.