The RPM 30mm Low Rail Cap Diving Board Mount FDE is a compact, purpose-built accessory designed by Ruff’s Precision Manufacturing to add modular capability to your existing RPM scope rings and cantilever mounts. Replacing the standard top cap on compatible 30mm rings, it provides a short Picatinny-style “diving board” rail that keeps add-on optics and devices securely mounted directly over the scope tube.

This mount is ideal when you want to run a rail-mounted laser rangefinder or a small red dot alongside your magnified optic without cluttering the receiver rail or interfering with your grip. Its low rail height keeps accessories close to the bore line while maintaining a clean, streamlined profile. Whether you are setting up a rifle for precise range work, training, or general range use, this cap-style mount reflects Ruff’s Precision Manufacturing focus on thoughtful design and reliable performance.

Key Features:

• Manufacturer: Ruff’s Precision Manufacturing
• Model: RPM 30mm Low Rail Cap Diving Board Mount FDE
• Unique Features: Replaces existing RPM ring cap; short Picatinny rail for laser rangefinders or secondary red dot; compatible with CLR series rings and Bravo/Delta cantilever mounts