The ornamental design for a firearmsuppressorcoversleeve, as shown and described.
FIG. 1 is view of a firearm suppressor mounted onto a firearm with the firearm suppressor cover sleeve attached;
FIG. 2 is a perspective view thereof;
FIG. 3 is a front view thereof;
FIG. 4 is a rear view thereof;
FIG. 5 is a left side view thereof;
FIG. 6 is a right side view thereof;
FIG. 7 is a top view thereof; and,
FIG. 8 is a bottom view thereof.
The broken line depiction of a firearm in FIG. 1 shows environmental structure associated with the design in a condition of use. In all the figure views, the broken lines depicted on the surface of the firearm suppressor cover depict unclaimed stitching. The broken lines and structures they depict do not form a part of the claimed design.