The Badger Arc Light Rail Kit is a night vision and accessory integration system for the Bushnell Elite Tactical LMSS 8-40x 60mm spotting scope. The Arc Light integration system allows you to attach multiple devices including Night Observation Devices, Co-aligned Laser Range Finders, Laser/Illuminators, weather meters, or red dot sights for rapid target acquisition. The Arc Light Integration System includes a rail grabber, mounting rail, night vision rail, and 3 accessory rails threaded for 1/4 20 threads. The Arc Light top accessory rail includes an integral Angle Cosign Indicator mount. All rails are MIL STD 1913 machined from 6061 aluminum and anodized Hard Coat Type III and the kit weighs 18oz.?