The BirdBuster is a shotgun sight system that springboards off of our award-winning M-Series shotgun sights. It features all of the magnetic sight bases needed to fit virtually any vent-ribbed shotgun and utilizes smaller diameter LitePipes in both round and triangular configurations. The sight has the ability to quickly move from your 28 gauge over and under after a woodcock hunt to your 10 gauge semi-auto as you head out for honkers. You may have more than one shotgun, but with the BirdBuster, you don"t need more than one sight.