How the 12mm Eurorail Works
How it Works
There are various Quick Release Mount Units available, including Rings Mounts, Picatinny Rail Mounts, Scope Rail Mounts and Red Dot Sight Mounts. For this example we are attaching a Quick Release Ring Mount Unit to a 12mm Euro Rail Base for Anschutz.
The 12mm Euro Rail Base is screwed to your rifle and come in a number of model specific options such as for Tikka T3, Remington 700, Sako 75/85, Winchester 70 and many more.

Each of the Quick Release Mount Unit is designed in the same way, with the same method of attaching to the 12mm Euro Rail Base. The Quick Release Mount Unit will have a Release Lever which Uncompresses the 12mm Rail Clamp, and on the underside of the mount it will have a Recoil Lug.
Each of the 12mm Euro Rail Bases will be designed in the same way also. They will have a length of 12mm Dovetail with usually two Recoil Lug Holes or Recesses. These are to act as a guide for the Quick Release Mount Unit to sit into and prevent any lateral movement.

To open the Quick Release Lever, there is a compression catch which you will need to press. This allows the lever to be opened out and in turn Uncompresses the Dovetail Clamp.
Once the lever is opened you are then able to place your Quick Release Mount Unit onto the 12mm Euro Rail. You can feel the Recoil Lug on the Mount Unit fit into the Recess on the Rail which means the lever is now ok to be closed. The 12mm Euro Rail usually has two Recesses, which means there is two positions to place the Mount Unit on the rail.

As you can see from this image of the Quick Release Lever in the Open position and in the Closed position, the Dovetail Clamp clamps into the 12mm Euro Rail thus securing the Mount Unit to the Rail.
If the Recoil Lugs have not been located into the Recoil Lug Recesses, you will not be able to close the lever and clamp the Mount Unit to the Rail. If you try to force the lever closed when it's not in the correct position it can damage the mount.
Some rifles have the 12mm Euro Rail as standard already built into the action. You can tell by measuring the width of the rail and if there are Recoil Lugs or Recesses towards the rear of the rail.

The Quick Release Mount Unit is fitted to the 12mm Euro Rail and the lever closed. The mount is now secured onto the Euro Rail and therefore the rifle.
You will not be able to release the Mount Unit without opening the release lever. A very secure system and provided you are mounting the Mount Unit into the same Recoil Recess, it will Repeat Zero.
One 12mm Euro Rail fitted to your rifle means you can mount several Quick Release Mount Units to your one rifle. You effectively exchange Mount Units/Scopes in a matter of seconds.
