TacStar Shotgun Rail Mount includes three Picatinny rails of the standard size, each of which is located 90 degrees from the next. This design gives the rail mount the ability to be configured in various arrangements to meet any needs for mounting accessories to your shotgun. The clamping system of the mount is easy to install and manages to offer strength and security without marring the extensions. You can select either a short (1.8-inch) or long (4.1-inch) shotgun mount. When selecting the ideal mount length, consider your accessories as well as extension length.