Shield Arms Revolver Optic Conversion Red Dot Sight Mount RMR Footprint Black. O.C.) allows for the process of modifying a revolver to accept a red dot sight (RDS). Traditionally revolvers have been equipped with iron sights but the trend in recent years is to adapt them to modern sighting systems such as red dot optics to improve accuracy speed of target acquisition and overall performance. Specifications for Shield Arms Revolver Optic Conversion Red Dot Sight Mount: Manufacturer: Shield Arms Color: Black Finish: Anodized Gun Make: Smith & Wesson Gun Model: Smith & Wesson Model 442 Revolver Gun Type: Revolver Fabric/Material: Aluminum Package Contents: Shield Arms Revolver Optic Conversion Red Dot Sight Mount Mounting Hardware Shield Arms SAROC442RMR: Revolver Optic Conversion Red Dot Sight Mount RMR Footprint Black