The ornamental design for a weightcarriervest, as shown and described.
FIG. 1 is a top, rear, left perspective view of a weight carrier vest showing our new design;
FIG. 2 is a rear view thereof;
FIG. 3 is a front view thereof;
FIG. 4 is a left side view thereof;
FIG. 5 is a right side view thereof;
FIG. 6 is a top view thereof; and,
FIG. 7 is a bottom view thereof.
The broken lines forming rectangular patterns with a central “X” depict stitching that forms no part of the claimed design. The other broken lines depict portions of the weight carrier vest forming no part of the claimed design.