The Limited Visibility Spotter Kit by Really Right Stuff enables a standard day optic to be co-aligned with a thermal or night vision optic for unimpeded viewing in environments with poor visibility. It utilizes the RRS MPR-360 multi-purpose rail which has sufficient space to mount the most popular length spotting scopes and camera lenses. At the end of the MPR-360 is the CRD-Rail with a PRA-135 picatinny rail attachment. This allows quick-detach clip-on thermal and night vision devices to be easily attached to the PRA-135 picatinny rail, which can then be aligned to the perfect height with the day optic using the adjustable CRD-Rail attachment. This Package Includes: RRS MPR-360 Multi-purpose railRRS CRD-Rail with safety screwRRS PRA-135 Picatinny rail with male RRS dovetail plate Mini-Clamp Package screw knob style quick-release clamp14.2” Cinema rail Really Right Stuff Limited Visibility Spotter Kit w/Mini-Clamp Package, 14.2"/360mm Cinema Rail, CRD-Rail, MPR-EC & PRA-135 RRS-9000464