The ornamental design for a watersprayinggun, as shown and described.
FIG. 1 is a perspective view of a water spraying gun showing my new design;
FIG. 2 is another perspective view thereof;
FIG. 3 is a front elevational view thereof;
FIG. 4 is a rear elevational view thereof;
FIG. 5 is a left side elevational view thereof;
FIG. 6 is a right side elevational view thereof;
FIG. 7 is a top plan view thereof; and,
FIG. 8 is a bottom plan view thereof.
The broken lines in the drawings and the areas within depict portions of the water spraying gun that from no part of the claimed design. In the back of the trigger and in the openings at the bottom of FIGS. 2 and 8 the unshaded areas and broken lines adjacent to solid lines depict portions of the water spraying gun that form no part of the claimed design.