Body of a Spray Gun

FIG. 1 is a first perspective view of a body of a spray gun showing my new design; FIG. 2 is a second perspective view thereof; FIG. 3 is a third perspective view thereof; FIG. 4 is a front view thereof; FIG. 5 is a rear view thereof; FIG. 6 is a right side view thereof; FIG. 7 is a left side view thereof; FIG. 8 is a top view thereof; and, FIG. 9 is a bottom view thereof. The broken lines in FIGS. 1 - 9 illustrate portions of the body of the spray gun that form no part of the claimed design.