The ornamental design for a verticalgrip, as shown and described.
FIG. 1 is a rear and side perspective view of a vertical grip.
FIG. 2 is a front and side perspective view thereof.
FIG. 3 is a side view thereof.
FIG. 4 is a front view thereof.
FIG. 5 is a rear view thereof; and,
FIG. 6 is a side view of the vertical grip in use configuration with an unclaimed firearm.
The broken lines in the figures represent portions of the vertical grip that form no part of the claimed design. The broken lines in FIG. 6 depict an unclaimed rifle included for environmental context and form no part of the claimed design.