Barrel Extension

FIG. 1 is a perspective view of a barrel extension showing the new design;

FIG. 2 is another perspective view thereof;

FIG. 3 is yet another perspective view thereof;

FIG. 4 is a front elevation view thereof;

FIG. 5 is a rear elevation view thereof;

FIG. 6 is a left side elevation view thereof;

FIG. 7 is a right side elevation view thereof;

FIG. 8 is a top plan view thereof;

FIG. 9 is a bottom plan view thereof;

FIG. 10 is a cross section view taken along line 10 - 10 of FIG. 4 ; and,

FIG. 11 is a cross section view taken along line 11 - 11 of FIG. 4 .

The broken lines depict features of the barrel extension that form no part of the claimed design.