Description
The RPM Diving Board 30mm Low Black (RPM part 30-LRC) is a replacement top cap for RPM 30mm scope rings and cantilever mounts that adds a short Picatinny rail above your scope. It lets you mount a secondary red dot right on top of your magnified optic, finished in black.
RPM Diving Board 30mm Low Black Overview
Ruff’s Precision Manufacturing designs its mounts to be compact and light while working with as many optic and accessory combinations as possible. The Diving Board simply replaces the existing top cap on one ring, so there is no extra clamp, no extra mount and nothing hanging off the side of the rifle. It fits all RPM CLR series rings and all RPM Bravo and Delta cantilever mounts in the matching tube size.
Why 30mm
Thirty millimeter is the most common tube size on modern hunting and precision scopes, so this version fits the widest range of optics in RPM rings and cantilevers. Make sure your RPM ring or cantilever is the 30mm version; RPM also makes the Diving Board in 34mm and 35mm.
Choosing Low Height
The low version keeps a secondary red dot as close to the scope as possible. It is intended for red dots paired with scopes that have low-profile or capped turrets, giving the quickest transition from scope to dot. RPM notes that rail-mounted laser rangefinders need the high version instead.
Common Uses
Typical setups include a micro red dot for close targets on a precision rifle, a backup dot on a hunting rifle with a low-turret scope, or a quick-transition dot for practical rifle matches. Because the rail rides on the scope ring itself, the accessory stays aligned with the optic and moves with it if you remove the scope.
Matching a Black Build
Black is the classic choice for most scopes, rings and rifles, and it hides wear well on a rifle that sees hard use. The black cap matches RPM black CLR rings and cantilevers, as well as nearly every scope finish on the market, so it disappears into the setup instead of drawing attention.
Installation
Remove the existing top cap from one ring and install the Diving Board in its place using the original cap screws from your RPM mount; screws are not included. Tighten evenly in a crisscross pattern to RPM torque specification, then mount your accessory on the rail and zero it separately from the scope.
Construction
The cap is machined in Flagstaff, Arizona from 6061-T6 aluminum and finished with a Type III hard anodized coating.
Note: the two gallery photos show the identical Diving Board design in other tube sizes and the same finish; this listing is the 30mm low version.
Honest Limitations
This cap fits RPM mounts only and only the 30mm size. It requires the cap screws from your existing RPM mount. A top-mounted accessory adds height and a little weight above the scope, so check turret and accessory clearance before buying.
Specifications
- Brand: Ruff’s Precision Manufacturing (RPM)
- Model: Diving Board Rail Cap
- Part number: 30-LRC
- UPC: 850063702195
- Tube size: 30mm
- Height: Low
- Finish: black
- Material: 6061-T6 aluminum, hard anodized
- Fits: RPM CLR rings, Bravo and Delta cantilevers
- Screws: Use original RPM cap screws (not included)
- Made in USA
Before You Buy
Confirm you own an RPM mount in 30mm and choose the height that fits your accessory and turret. Rail caps are not firearms, so no FFL transfer is needed and this ships straight to your door.
Who It Is For
The RPM Diving Board 30mm Low Black is a great fit for precision shooters and hunters using RPM mounts who want a clean way to add a red dot above their scope.
Buy the RPM Diving Board 30mm Low Black at MAG5 Firearms
MAG5 Firearms is a family-owned FFL in Collegeville, Pennsylvania. Order the RPM Diving Board 30mm Low Black online, or browse our optics section for red dots, mounts and rings. For more details, visit our distributor listing.
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