The ornamental design for a toygun, as shown and described.
FIG. 1 is a front elevational view of a toy gun showing my new design;
FIG. 2 is a rear elevational view thereof;
FIG. 3 is a left side view thereof;
FIG. 4 is a right side view thereof;
FIG. 5 is a top plan view thereof;
FIG. 6 is a bottom plan view thereof;
FIG. 7 is a bottom, front and right side perspective view thereof;
FIG. 8 is a top, rear and left side perspective view thereof;
FIG. 9 is an enlarged view of portion 9 in FIG. 7;
FIG. 10 is an enlarged view of portion 10 in FIG. 7; and,
FIG. 11 is an enlarged view of portion 11 in FIG. 8.
The evenly spaced broken lines in the drawings illustrate portions of the toy gun that form no part of the claimed design. The dot-dash-dot broken lines depict boundaries of the detailed enlargement that form no part of the claimed design.