Kinnitus Gopro

A compact aluminum mount designed for serious riders, the Pro Seat Rail Mount allows you to capture the rear-facing angle—including riders in tow, the scene you just passed and anything else in your rearview.Compatible with most two-rail seat designs and all GoPro cameras and housings.
Light and durable aluminum construction.
Clamps to most two-rail seat designs, enabling rear-facing shots.
Compact, under-seat position makes this mount nearly invisible.
Uses a single screw to mount under seat, meaning less setup is required.