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40mm Scope Ring Mounts

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One Piece Pivot Mounts
Spare Parts for Pivot Mounts

The 40 mm main tube diameter is one of a kind, found only with the Romanian rifle scope manufacturer IOR. Why they have decided to make the tube so wide? Maybe it is easier for them to fit all their technology inside and to get extreme elevation range. Never the less the scope is massive and so are the mounting rings.

Like with all other tube diameters there is one main thing to keep an eye out when mounting – the proper torque. Go over the torque value and the rifle scope is damaged. Go under and it will not be sturdy enough for a good, precise shot. The torque value should be monitored and done with a purpose made screwdriver. Do not exceed 2.2 Nm.

The rings are made by:

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VIDEO

Pivot mounts are a special kind of repeatable mounts that are especially popular in Europe and mainly produced by European manufacturers. Most notable among them are German Companies like EAW (Ernst Apel Wurzburg), Recknagel, Henneberger and MAK. These Companies were also among the first to produce mounts of this type. Non German companies like Rusan are also following this trend.

Main benefits of pivot mounts, or swing mounts as they are sometimes called are:

  • 100% repeatability,
  • very quick and easy detaching and reattaching,
  • extremely durable; most mounts of this kind are tested on 10000 or more reattachments,
  • size and weight; light and small, elegant.

There are also some minor weaknesses that such mounts posses and they are: they are usually more expensive than other types of mounts, the installation on the rifle should be done by a skilled gunsmith and most of these mounts are higher than 14 mm.

A distinct feature of pivot/swing mounts is the way the scope attaches to the rifle. The front foot of the mount on the scope is inserted in the front base under a 90 degrees angle to the barrel. Then the entire scope is pivoted around the front base until it is locked into position by the rear base.

Pivot mounts of all types enable windage correction on the rear base at the time of the mounts installation. There are three main types of pivot mounts which are distinguished by the type of the rear base:

  • EAW style rear base: produced by EAW and Rusan,
  • Dovetail rail base: produced by Recknagel, Henneberger, MAK and others.
  • Leupold type rear base