Mesa Tactical SureShell Carrier and Reflex Red Dot Sight Mount Beretta 1301 Tactical/A300 Polymer 6-Shell 12 Gauge Trijicon RMR 3.25 in Black. When installed on the shotgun the RMR sight co-witnesses with factory ghost ring sights. Specifications for Mesa Tactical Polymer SureShell Carrier and Reflex Red Dot Sight Mount: Manufacturer: Mesa Tactical Color: Black Finish: Matte Gun Type: Shotgun Fabric/Material: Polymer Red Dot Sights-Footprint: RMR Hand: Left Handle Color: Black Size: 6-shell Gauge: 12 Features of Mesa Tactical Polymer SureShell Carrier and Reflex Red Dot Sight Mount Includes an integrated Trijicon RMR reflex sight mount that co-witnesses with factory ghost ring sights Innovative rubber friction retention system solidly holds shotshells in place Type 3 hard coat anodized for flat black durable finish on aluminum parts Mounts via drilled and tapped receiver holes Lifetime warranty Package Contents: Mesa Tactical Polymer SureShell Carrier and Reflex Red Dot Sight Mount Mesa Tactical 95310: SureShell Carrier and Reflex Red Dot Sight Mount Beretta 1301 Tactical/A300 Polymer 6-Shell 12 Gauge Trijicon RMR 3.25 in Black