Barbecue grill assembly

FIG. 1 is a perspective view of a barbecue grill assembly, showing our new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a bottom plan view thereof;

FIG. 6 is a right side view thereof; and,

FIG. 7 is a left side view thereof.

The details shown in broken lines in all views are for illustrative purposes only and form no part of the claimed design.