35mm Scope Rings

General features of scope rings

35mm scope rings and mono-block mounts are usually very wide, with at least 20mm width. This way there is a huge contact surface between the scopes and the mounts.

The size of 35mm main tube is a rarity, a kind of compromise done by only a couple of companies: the Romanian IOR and the USA-based Vortex and Leupold. Why did they choose to use this diameter is a mystery by itself. Especially in a time when all other rifle scope manufacturers are producing scopes of the same Category with 34mm tubes. Due to this reason, there are only a couple of manufacturers of mounts that produce mounts with this diameter. Almost all mounts for such scopes are of tactical nature, either in the form of tactical scope rings or tactical mono-block mounts.

The most well-known brands of mounts of this diameter are:

35mm Scope Rings

Contessa 35mm Scope mount

The most important thing when mounting a rifle scope with rings is to be aware of the torque needed to fasten the screws in the scope rings. Go over the limit and the structural integrity of the rifle scope will be compromised. Scope rings can also leave a visible mark if not tightened accordingly. The amount of torque should not exceed 2.2 Nm

Is lapping of the 35mm scope rings really needed?

Lapping is a process that is essentially lining two mounting rings perfectly to one-a-another. It is done with special cylinders that grind off the excess metal.

When the ring is constructed from two near half circles - so if the circle of the ring is split in half, roughly in the ratio 50:50 and such riflescope rings are mounted on two separate mounting bases, then lapping is recommended. If lapping is not performed, the very small offsetting can be present when all the different pieces of the mount come together and when both scope rings are mounted on two separated bases. If the mounting of two high-quality scope rings is done on a single-piece base, then lapping is not needed. This is one of the reasons that Picatinny rails are becoming so popular in recent years.

In the worst-case scenario, the axis that runs through the center of the rear scope ring does not completely match the axis that runs through the center of the front ring. For this reason, the scope, if mounted into such rings is under unwanted structural stress. The most obvious problems that occur due to this reason are less than perfect optical performance, tracking problems, the side focus mechanism can stop working and the point of impact groups can be dispersed.

Accessories and tools for lapping 35mm scope mount

With 35mm scope mount, there is also quite problematic to get suitable lapping tools, since most of them are produced in 30 and 34mm diameters. It is a good idea to use a ribbon cut from latex/rubber gloves on the lower contact surface in the ring.

Scope mounts that don't need lapping

Lapping is also not required with monoblock mounts and all mounts are made from one piece of material and alignment of both scope rings is usually perfect. Lapping is also not required with high-quality European mounts since their tolerances are minimal.

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INNOmount QD Mount for Merkel B3/B4, 35 mm

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A Merkel Suhl Tilt-up mount is a mounting system found on Merkel repeating rifles KR1 and on their break barrel rifles like the single shot K3/K4 and at combination rifles B3/B4. This mounting solution offers great flexibility since the same mounts are used on such different types of rifles and on the other hand, it offers 100% repeatability. Other advantages are:

lightweight, small and elegant mounts,
low height of mounting, including for the scopes with rails,
very easy and straight forward handling of the mount.

This mounting system has 4 mounting grows directly on the barrel and a cross section for the recoil stopper at the top of the barrel. Mounting of riflescopes directly on the barrel offers an advantage that it is possible to change the barrel and the scope together. Merkel KR1 is a prime example where a user can have multiple barrels with multiple scopes for one rifle only. Additionally since Merkel Suhl Tilt-Up mounts offer 100% repeatability, the user can have multiple scopes on each of the barrels. This type of mounts offer true versatility.

Even though Merkel Tilt-up mounting system has 4 groves and one recoil slot, most of the mounts for red dot sights clamp only to two groves and not all four. Nevertheless these mounts also fit on all rifles with this mounting system and also provide 100% repeatability.

Merkel Suhl Tilt-Up mount is used on the following rifles:

Merkel KR1,
Merkel B3/B4,
Merkel K3/K4.

35mm Scope Rings

General features of scope rings

Is lapping of the 35mm scope rings really needed?

Accessories and tools for lapping 35mm scope mount

Scope mounts that don't need lapping

INNOmount QD Mount for Merkel B3/B4, 35 mm

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35mm Scope Rings

General features of scope rings

Is lapping of the 35mm scope rings really needed?

Accessories and tools for lapping 35mm scope mount

Scope mounts that don't need lapping

INNOmount QD Mount for Merkel B3/B4, 35 mm

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