The ornamental design for a firearmcover, substantially as shown and described.
FIG. 1 is a front, top, and left side perspective view of a firearm cover embodying our new design;
FIG. 2 is a front elevation view thereof;
FIG. 3 is a rear elevation view thereof;
FIG. 4 is right side elevation view thereof;
FIG. 5 is left side elevation view thereof;
FIG. 6 is top plan view thereof;
FIG. 7 is bottom plan view thereof; and,
FIG. 8 is a perspective view thereof.
The broken line showing of a rifle is included for the purpose of illustrating environment and forms no part of the claimed design. The series of dots disclosed on the drawings is illustrating conventional stitching.