The UVF Mount V2 NATO Rail Kit lets you attach and adjust a viewfinder on a rig, built around an approximately 5" NATO rail with standard-size dimensions. A viewfinder mounting bracket is included and attaches directly to the kit's NATO rail, with most viewfinders compatible; an adapter for Alphatron and SmallHD viewfinders is also included. A safety pin on the bracket prevents accidental removal once it's positioned on the rail.