FIG. 1 is a top, front, right side perspective view of a muzzle attachment clip embodying my design;

FIG. 2 is a rear elevational view thereof, the front elevational view being a mirror image thereof;

FIG. 3 is a left side elevational view thereof, the right side elevational view being a mirror image thereof;

FIG. 4 is a top plan view thereof; and,

FIG. 5 is a bottom plan view thereof.

The broken lines demonstrate a slot and form no part of the claimed design.