I claim the ornamental design for a pnuematic gun bolt, as shown and described.
FIG. 1 is a top perspective view of a pnuematic gun bolt, showing a first emboidment of my new design;
FIG. 2 is a bottom perspective view of FIG. 1;
FIG. 3 is a left-side elevational view of FIG. 1, the right-side elevational view, front elevational view, and rear elevational view all being identical thereto;
FIG. 4 is a top plan view of FIG. 1;
FIG. 5 is a bottom plan view of FIG. 1;
FIG. 6 is a top plan view of a second embodiment thereof; and,
FIG. 7 is a bottom plan view of FIG. 6.
It is understood that the left-side elevational view, right-side elevational view, front elevational view, and rear elevational view of the first and second embodiments are identical.
The broken lines in the drawings illustrate environmental matter that forms no part of the claimed design.