Choate Tool Remington Night Manager 870/1100/1187/Versamax 7 Shot12 Gauge. An aluminum shroud drilled and tapped for Picatinny rail sections slides over and threads onto the base fo the magazine tube extension. This locks the three position sling mount in place. The shroud can be oriented with the rail sections anywhere long the sides or the bottom. An AR style castle nut locks everything in place. The magazine tube extension and sling mount are made from steel. The Night Manager for the Remingotn 870/1100.11-97 includes the tube extension spring follower one Picatinny rail section sling mount and drilled and tapped aluminum shroud. Specifications for Choate Tool Remington Night Manager 870/1100/1187/Versamax 7 Shot: Manufacturer: Choate Tool Magazine Capacity: 7 Round Country of Origin: USA Features of Choate Tool Remington Night Manager 870/1100/1187/Versamax 7 Shot Pictinny Rail sections are position adjustable Made from steel and aluminum with a polymer mag tube follower includes 3-position sling mount. Package Contents: Choate Tool Remington Night Manager 870/1100/1187/Versamax 7 Shot Choate Tool CMT-01-04-14: Remington Night Manager 870/1100/1187/Versamax 7 Shot12 Gauge