A rail mount adapter for the RAM-114BMU base, the RAM Mount RAM-ROD Rail Mount Adapter Kit joins to base plates with the screws provided and turns the flat base into a rail base. The adapter is a U shape, so it can wrap around a tube mount and the clamp by joining to the flat base. Made of high-strength composite material. Includes stainless steel mounting screws. Weight: 0.36 lbs.
*Note: This is the rectangular back piece in the above picture.