The ornamental design for a spraygun having a snap-on coupling on the top thereof, as shown and described.
FIG. 1 is a perspective view from the front of the spray gun having a snap-on coupling on the top thereof in accordance with my design;
FIG. 2 is a view similar to FIG. 1 wherein the trigger on the spray gun is shown in actuated position while the trigger is shown in un-actuated position in FIG. 1;
FIG. 3 is a view in elevation thereof;
FIG. 4 is a perspective view thereof shown in a generally horizontal position;
FIG. 5 is an elevational view thereof taken from the side thereof opposite to the side shown in FIG. 3;
FIG. 6 is an end view taken from the left thereof but tilted forwardly so that the coupling at the top is not visible in FIG. 6; and,