Foam Gun

FIG. 1 is a rear, right and top perspective view of a foam gun, showing my new design; FIG. 2 is a front, right and top perspective view thereof; FIG. 3 is a perspective view thereof, shown in an environment of use; FIG. 4 is a perspective view thereof, shown in an environment of use; FIG. 5 is a front view thereof; FIG. 6 is a rear view thereof; FIG. 7 is a left side view thereof; FIG. 8 is a right side view thereof; FIG. 9 is a top plan view thereof; and, FIG. 10 is a bottom plan view thereof. The broken lines shown in the drawings illustrate portions of the foam gun that form no part of the claimed design. The additional broken lines shown in FIGS. 3 and 4 illustrate environmental subject matter and form no part of the claimed design.