Pro-Shot Payne Galway Chamber Brush For 28 Gauge Shotgun Chambers. For use in over and under side by side and single barrel guns. Not intended for semi-autos. Package Contents: Pro-Shot Payne Galway Chamber Brush The Pro-Shot Payne Galway Chamber Brush For 20 Gauge Shotgun Chambers PG20 is a quality addition to the Pro-Shot lineup. For more great deals on Chamber Brushes by Pro-Shot please browse our Pro-Shot Gun Cleaning Kits page. Pro-Shot Payne Galway Chamber Brush For 28 Gauge Shotgun Chambers