The ornamental design for a firearmtopcoversight mount, substantially as shown and described.
FIG. 1 is a perspective view a firearm top cover sight mount according the present invention;
FIG. 2 is a view similar to FIG. 1 with the environment of the firearm and the sight shown in FIG. 1 removed therefrom;
FIG. 3 is a top plan view of the top cover sight mount shown in FIG. 2;
FIG. 4 is an elevation view of a right side of the top cover sight mount shown in FIG. 2;
FIG. 5 is an elevation view of a front side of the top cover sight mount shown in FIG. 2; and,
FIG. 6 is a bottom plan view of the top cover sight mount shown in FIG. 2;
The left side and rear side elevation views would be a mirror image of the respective right side and front side elevation views as shown in FIGS. 4 and 5.
The broken lines are for illustrative purposes and represent environmental structure and unclaimed portions of the invention and therefore form no part of the claimed design.