Exterior portions of guard assemblies for parcel door locking systems of cluster box unit mail delivery receptacles

FIG. 1 is a perspective view for exterior portions of guard assemblies for parcel door locking systems of cluster box unit mail delivery receptacles showing our new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a left side view thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is a top plan view thereof; and,

FIG. 6 is a bottom plan view thereof.

The broken-line disclosure found in certain of the drawing views is provided for illustrative purposes only and forms no part of the claimed design.