The ornamental design for a surfacepattern of a firearm barrel, as shown and described.
The patent or application file contains at least one drawing executed in color. Copies of this patent or patent application publication with color drawing(s) will be provided by the Office upon request and payment of the necessary fee.
The FIGURE is a side view of a surface pattern of a firearm barrel, showing our new design.
The present design is smooth to the touch and possesses no three-dimensional properties other than being applied to a round barrel of a firearm as shown in the drawings. The broken lines in the drawings depict the boundary of the claim and form no part of the claimed design.