The ornamental design for a stungun, as shown and described.
FIG. 1 is a front perspective view of a first embodiment of a stun gun showing the claimed new design;
FIG. 2 is a front elevational view of the stun gun of FIG. 1;
FIG. 3 is a rear elevational view of the stun gun of FIG. 1;
FIG. 4 is a left side elevational view of the stun gun of FIG. 1;
FIG. 5 is a right side elevational view of the stun gun of FIG. 1;
FIG. 6 is a top plan view of the stun gun of FIG. 1; and,
FIG. 7 is a bottom plan view of the stun gun of FIG. 1.
The dot-dash lines represent boundaries of the claimed design. The dot-dash lines depict environmental subject matter that forms no part of the claimed design. The broken lines in the drawings depict portions of the stun gun that form no part of the claimed design. The broken lines and unshaded regions bounded by broken lines form no part of the claimed design.