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Info om Spuhr montasjene og montering

ISMS – IDEAL SCOPE MOUNT SYSTEM

Extremely sturdy scopemount, with possibility to attach multiple optical accessories directly to the mount. Built-in level. 45 degree split of the rings gives better view of the knobs.

Durability
Prevents damage on scope due to flexing during heavy recoil or rough environment. The snipers rifle and the spotters carbine can have the same mount, enabling the use of same equipment and accessories. Rings are grooved inside to get a better grip of the scope and enabling gluing of the scope. The mount is milled out of one billet of material instead of being screwed together of small parts.

Scope rotation
Patent pending solution for indexing the rotation of the scope, using an included tool/gauge to index the scope correctly to the mount and gun. Important since a incorrectly indexed scope unintentionally will also have a sideways adjusted point of impact and since it will be adjusted sideways when it is adjusted for elevation.
Mounting placements
Traditionally lasers have been mounted on the forend of the rifle, a solution with drawbacks. For the same reasons you don’t want your barrel to touch the forend you don´t want the sights to be mounted on the forend. Our mounting system have minimum seven interfaces for accessories and the laser can easily be mounted on the mount, given the advantage of undisturbed laser and the weight more central on the gun instead of forward.

Tilt
Mounts can be delivered in various tilts. The tilt is clearly engraved on the mount, in both MIL and MOA.
Accessible and readable dials
The rings are cut 45 degrees instead of horizontal as usual, providing several advantages. The screws holding the parts together are not in the way of the knobs, thus the shooter can quickly determine the settings of the knobs. It also gives the shooter a horizontal line that not directly are seen but is existing and helping the shooter not to rotate his gun unintentionally. The rings have index marks on the top and right side, making low knobs more easily readable

Accessories
Possibility of using various accessories such as angle cosine indicator, back up sights, lasers, illuminators, Night vision mounts etc. With traditional mounts this can be achieved only if there is sufficient space on the middle tube for additional rings, which there rarely is. Ideal Scope Mount System have interface surfaces directly on the mount, making it possible to mount accessories either by Picatinny rails or as direct interfaces for certain accessories as angle cosine indicators and red dot sights. A selection of interfaces for popular accessories are available, and others can be made to specification.

Level
The sight mount have a level included inside the mount.

 

 

HOW TO CHOOSE THE RIGHT MOUNT

We have the worlds most comprehensive line of tactical scope mounts; it currently spans about 45 different models of various heights, tilts, lenghts and ring dimensions.
Here is a short guide to help you choose the right one for your needs.

Picatinny or direct mount?
The first obvious question is if the mount should be a Picatinny mount or a direct attachment mount such as our line of ISMS mounts for Accuracy International, Sako TRG and Sauer SSG.
The main purpose for using a direct mount is to allow a stronger and lower positioning of the rifle scope. If there’s no need for Picatinny we generally recommend direct mounts on these rifles.

Tilt.
Tilted mounts are necessary when shooting at very long distances. We generally recommend as little tilt as possible as the tilt really does nothing to improve the picture quality. In most cases 6-9 MIL (20-30 MOA) will have no negative impact on picture quality while a greater tilt can
lead to problems.

To allow for the greatest available range of adjustment choose a mount with a tilt that is half of the scope’s range of elevation.
For example Schmidt & Bender 5-25x56 have a maximum 26 MIL (93 MOA) in elevation, then choose a mount with 13 MIL (45 MOA) in tilt. Doing so assures that you are able to adjust the sight out to very long distances.

However when mounted in this extreme elevation it’s common to experience optical defects such as an oval picture etc.
We therefore recommend that when fitting a large elevation scope (such as 26 MIL/93 MOA) on a .308 rifle that will only be used out to 1000 meters, to choose a 6 MIL/20 MOA tilt as it’s more than sufficient for that use.

Height
The height of a mount is always measured from the top of the rail to the center of the scope. In the case of a tilted mount the measurement is made at the rear of the mount.

Night vision/thermal compatible
When combining the scope with a clip-on system such as PVS22 or NSV 80 to name a few the height of the mount is not important. Also the instrument doesn’t have to be perfectlyin line with the scope.

If we have an offset of 10mm in height betwen the primary optic and the NV clip-on the change in point of impact will be 10 mm on 100 meters as well as 10 mm on 300 and 1000 meters; thus the point of impact change is fully parallell.

Therefore it’s often unneccesary to have extremely high mounts just to facilitate in-line mounting of a clip-on systems. Various systems allow varying degrees of angular difference. A common maximum angular  difference is 2 degrees.

Please consult the manufacturer of the thermal device before you make expensive alterations to your gear.

 

 

 

EXPLAINING THE MODEL MARKING - ISMS

   1     2  3  4  5
S P-4 6 0 1
(see explanation in the text below)

Most items from Spuhr are marked with a model number and a batchnumber. When ordering please refer to the model numbers.

The model number is often one or two letters followed by one to four numbers; for example SP-4601.

The batch number is a single letter followed by four numbers. For example M-1204 or M12/04 the numbers indicate year and month.

Scope mounts are always marked with a model number consisting of two letters followed by four numbers.


1 The letters means:
- SA - Scope mount Accuracy International (11mm dovetail)
- ST - Scope mount TRG (17 mm dovetail)
- SP - Scope mount Picatinny
- SS - Scope mount Sauer (for Sauer SSG and STR rifles)
- SR - Scope Rings (separate rings for Picatinny rail)

The first number identifies the scope diameter.
2 The first number means:
3 - 30 mm tube
4 - 34 mm tube
5 - 35 mm tube
6 - 36 mm tube

The second number identifies tilt.
3 The second number means:
0 - 0 tilt
6 - 6 MIL/20,6 MOA tilt
7 - 7 MIL/24 MOA tilt
8 - 13 MIL/44.4 MOA tilt and 11 MIL/40 MOA tilt
9 - 9 MIL/31 MOA tilt

Third number is reserved for future use.
4 The third number means:
- N/A

The fourth number identifies the height of the mount.
The height of a mount is always measured from the top of
the rail to the center of the scope. On a tilted mount the
measurement is made at the rear of the mount.
5 The fourth number means:
1 - 35 mm/1,38”
2 - 37 mm/1,46”
6 - 34,3 mm/1,35”
7 - 39 mm/1,535”

 

 

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