FIG. 1 is a perspective view showing front, top and right portions of a caulking gun with foldable operating handle embodying my design, with the plunger of the caulking gun nested and the operating handle of the caulking gun folded, it being understood that the front and rear sides of the gun are mirror images of each other;

FIG. 2 is a perspective view thereof showing front, bottom and right portions;

FIG. 3 is a perspective view thereof showing front, top and left portions;

FIG. 4 is a perspective view showing the front, bottom and right side portions, with the plunger and operating handle extended, wherein the broken line showing of the caulk tube is for illustrative purposes only and forms no part of the claimed design;

FIG. 5 is a perspective view showing the front, top and right side portions, with the plunger and operating handle extended, wherein the broken line showing of the caulk tube is for illustrative purposes only and forms no part of the claimed design;

FIG. 6 is a top plan view of the caulking gun on a diminished scale with the plunger and operating handle extended;

FIG. 7 is a bottom plan view thereof, on the same diminished scale as FIG. 6;

FIG. 8 is a left end elevational view thereof, on an enlarged scale; and,

FIG. 9 is a right end elevational view thereof, on the same enlarged scale as FIG. 8.