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LM rail Mounts

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One Piece Pivot Mounts

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The LM rails were a popular mounting solution in the previous decades in Europe. It has since then been almost entirely replaced by other, more modern mounting types. This rail is prismatic in its cross shape, with the angles of the rail placed at a 70° angle – therefore it was also known as the 70° prism rail. At the base it was 15 mm wide. The old rifle scopes had the LM rail attached to them at two points. The first point of securing the scope was on its objective. It was done quite similar to that of the Suhl or German Claw mount. The other point of contact was situated on the rifle scopes main tube, about the same place as it is done today. For this reason the LM rail was thin at one end and thick at the other. There was also a difference of height of both rails and in most cases, custom mounting solutions had to be made to compensate for this difference.

In the past there weren't so many standards. That is why almost every single LM rail was individualy fitted and custom finished to join the rifle scope with its firearm. The results were higher costs and non-interchangeable parts. In order for the rail to stay in its place and not to compromise the shooting accuracy, it was fixed to the rifle with a hole bored through the rail and the rifle, which was later fastened with a screw. It acted as a recoil stop as well. In today's world, there are almost no producers of scopes with LM rail on the market.

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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