RPM 30mm Low Rail Cap Diving Board Optic Mount FDE

RPM’s rail cap swaps out the top half of a scope ring and puts a short Picatinny rail, the diving board, across the tube. That rail is where a clip on laser rangefinder or a small red dot goes, which keeps both devices on the optic instead of hanging off the receiver rail where they crowd the mount and your hands.

This one is sized for 30mm rings in the low rail height, finished in FDE. It fits across RPM’s line, including the CLR series rings and the Bravo and Delta cantilever mounts, so an existing mount takes the accessory without being replaced. Installation is a cap swap: pull the top cap, set this one in its place, and bring the screws down evenly so the tube is not pinched.