Weight portion for a golf club iron head

FIG. 1 is a bird's-eye perspective view of my ornamental design for a weight portion on the rear of a golf club iron, with phantom lines indicating the environmental structure associated with the design which form no part of the claimed design throughout the figures;

FIG. 2 is a elevation of the weight portion;

FIG. 3 is a side elevation of the weight portion, as viewed at lines 3—3 in FIG. 2; and,

FIG. 4 is a cross-section of the weight portion, taken along lines 4—4 in FIG. 2.