Kinetic Development Group NOX Nighttime Optic Extension Anodized Black. The NOX Attachment is a direct fitment that attaches to the bottom of the Optics Hub. Affixed with 1913 picatinny rail and completely adjustable for height and length the NOX will ensure the fitment of a variety of optics and tripod attachment so you can own the night. Made from 6061 aluminum and Hardcoat anodized for a rugged non-reflective finish. The NOX Attachment is a great addition for hunting law enforcement agencies military personal or anyone who just likes to watch. All necessary hardware to mount to the Optics Hub Specifications for Kinetic Development Group NOX Nighttime Optic Extension: Manufacturer: Kinetic Development Group Color: Anodized Black Features of Kinetic Development Group NOX Nighttime Optic Extension: 1913 picatinny rail Adjustable rail height Reversable rail mount Adjustable mounting locations 6061 Aluminum Hardcoat anodized black Some assembly required Dimensions LWH 13.3 x 3.5 x 3 (inches) 1.04 lbs Package Contents: Kinetic Development Group NOX Nighttime Optic Extension All mounting hardware Kinetic Development Group MSH5-150: NOX Nighttime Optic Extension Anodized Black