Abstract: An attachment for use in association with a shotgun, defined by a clip member formed of memory retentent material such as spring steel mounted about a rib and barrel of an associated shotgun adjacent the muzzle of the shotgun to provide visual indication of a shotgun pattern at a predetermined yardage. The device is defined by a discontinuous sighting tube mounted to spaced left and right flanges, wherein the flanges each include a medially positioned and upwardly projecting respective left and right abutment member and downwardly depending plural pairs of legs for securement in a resilient manner in a shotgun rib.