The ornamental design for a spraygun, as shown and described.
FIG. 1 is a perspective view of a new design for a spray gun.
FIG. 2 is a front view thereof;
FIG. 3 is a rear view thereof;
FIG. 4 is a left side view thereof;
FIG. 5 is a right side view thereof;
FIG. 6 is a top view thereof; and,
FIG. 7 is a bottom view thereof.
The solid line showing illustrates the claimed features within the design for the claimed article of manufacture, while the broken line showing illustrates the non-claimed features within the design for the claimed article of manufacture. The shading is provided to illustrate contour only and is not an indication of texture, gloss, etc.