The ornamental design for a firearmstabilizationdevice, as shown and described.
FIG. 1 is a perspective view of the firearm stabilization device.
FIG. 2 is a front elevation of the firearm stabilization device, the rear elevation being a mirror image thereof.
FIG. 3 is a top plan view of the firearm stabilization device.
FIG. 4 is a bottom plan view of the firearm stabilization device.
FIG. 5 is a left elevation of the firearm stabilization device.
FIG. 6 is a right elevation of the firearm stabilization device; and,
FIG. 7 is an exploded view of the firearm stabilization device.
The broken lines in the figures depict surface markings, portions of the device, and hidden internal components that form no part of the claimed design.