We claim an ornamental design for a laser device for firearm, as shown and described.
FIG. 1 is a perspective view of a laser device for firearm, showing our new design;
FIG. 2 is a front view thereof;
FIG. 3 is a rear view thereof;
FIG. 4 is a right side view thereof;
FIG. 5 is a left side view thereof;
FIG. 6 is a top view thereof;
FIG. 7 is a bottom view thereof; and,
FIG. 8 is a perspective view of the laser device for firearm, shown mounted on a firearm.
The broken lines are included for illustrating interior portions of the laser device that form no part of the claimed design. The broken lines in FIG. 8 depict a handgun and form no part of the claim.