Our Nimbus rings represent the first completely new thinking in scope-mount design in many years. They don’t just look different. The difference is real...and you’ll feel it the first time you tighten a Nimbus mount around a scope.
Scope-mount rings of traditional design are distorted when you tighten their clamping screws. Tension is applied though flanges or lugs that extend from the rings and act as levers, literally bending the rings. This creates a soft, spongy feel when you tighten the screws, and causes the gap between the flanges to close up before you can reach full screw tension, limiting the rings’ grip on the scope. It’s also the reason for those ugly "pinch marks" that appear on the tube of your expensive scope. As the ring halves bend, concentrated pressure builds at the joints until it exceeds the yield strength of the scope tube, and the rings actually dig into the scope, producing permanent damage.
The Nimbus Difference
The design of the Nimbus scope mount avoids these problems. It feeds screw tension into the ring cap from a lower saddle which is strongly braced to prevent bending. The cap itself has tapered sidewalls which accept the screws directly, without extended flanges. When the screws are tightened, they produce force in line with the sidewalls, so there is no torque acting to distort the cap, or cause damage. The cap simply conforms to the scope tube, producing the greatest possible pressure over the greatest possible area.
The Nimbus ring is a highly rigid structure. Screw tension is not wasted by bending parts. As you turn in the screws, you will discover they "bump up" solidly, then come fully tight in a fraction of a turn. All force from the screws is applied along straight lines that are tangential to the scope tube. This produces maximum tension in the cap, and distributes pressure evenly.
If that isn't enough, the rigidity of the Nimbus design allows employing more screws to clamp our rings around the scope tube. We use four screws where other makers put two. In combination with the greater screw tension possible with our design, this increases net force acting on the scope through the ring cap to unprecedented levels, and also distributes force more evenly. As our diagram shows, a relatively small amount of tension on each screw adds up to produce a lot of force between scope and ring.
All of this gives very positive results. You get more contact area between scope and ring, and more force acting on that area. Naturally, that means greatly improved ability to hold your scope securely, without slipping in recoil.
Technical Details
Supplied with attractive bead-blasted matte finish. (The simple profile makes the Nimbus mount exceptionally easy to polish if you prefer a bright finish like that shown in the photos.)