EAW Steel Picatinny, Mercury 870

Introduction

Picatinny rail consists of slots with 5.23 mm spaces between one another, which means that it can be used across its entire length. It is simple to mount and interchangeable – if something is made for a Picatinny rail, it will fit regardless of the manufacturer or manufacturing date. It is affordable, resilient and reliable – this is why it so commonly used by professionals and military. Because of all its great qualities, Picatinny rail has been dominating the rail market in the recent years.

Picatinny is a big step forward from the Weaver standard. Weaver has a few predesignated slots while Picatinny has slots all over its surface, allowing the device to be mounted wherever the user finds it fitting. Weaver's slot is 3.8 mm wide, which is why ring mounts made for a Weaver rail will also fit on a Picatinny rail while ring mounts made specifically for a Picatinny rail will not fit on a Weaver rail. This is one of the main reasons why Picatinny is a far better mounting solution.

EAW is a German company, known for producing top-quality mounts. Their Picatinny rails, which are all made from steel, have a nice finish and come with a unique channel in the middle, allowing the user to clearly see the rifle's sights. Screws are included. EAW chooses only the best materials for their products. All of these great features; however, come at quite a steep price.

About the rifle

Mercury is a brand owned by Frankonia. The products under this brand are manufactured by other renowned firearm companies. Mercury 870, for example, is manufactured by Sabatti and is actually a replica of Sabatti Rover 870.

Mercury Repetierbüchse (repeating rifle) 870 is same as Sabatti Rover 870. There are two locking lugs on the bolt. The action is push-feed. Mercury 870 is chambered for the following calibers: .243 Win., .308 Win., .30-06 Sprg., 7x64, 8x57 IS, and 9.3x62, 7mm Rem. Mag. and .300 Win. Mag. There are many versions to choose from Standard, Compact Scout, Luxus DL, GFK Soft-touch, Compact Allround, Inox, GFK Lochschaft Soft Touch, Varmint Compact and Synthetik. The fixed magazine holds a maximum of 5 rounds. On the receiver, there are four holes for mounting purposes – two at the front and two at the rear. The back mounting surface is flatter than the front one – the radius of the front surface is R17 while the radius of the back surface is R60.

This mount is suitable for rifles Mercury 870, Repetierer SA (short-action) with B distance of 87.7 mm (see image below), 16.5 mm receiver head radius and BHU (difference in height between receiver head and bridge) of 2.9 mm.

If you are looking for EAW Picatinny rail for a long-action Mercury 870 rifle with B distance of 102.5 mm, click here.

A: 21.9 mm
B: 102.5 mm
C: 15.3 mm
BHU: 2.9 mm
Fi: 6-48
R1: R17
R2: R60

Mounting instructions

Remove all the stains (grease, oil etc.) from the rifle's receiver with a cleaning fluid (acetone). Once the surface is clean and dry, check whether the screws match the rail and the holes on the receiver. Make sure that the Picatinny rail is compatible with the rifle by inspecting the mounting holes on both. Before mounting the rail permanently, apply a minimal amount of thread-locking fluid 278 or 648 on screws and contact surfaces. Be careful not to get the fluid in or near the mounting holes. Carefully clean the remaining excess fluid around the rail with a cleaning fluid. Using a torque driver, screw the screws appropriately (up to 2.2 Nm) – do not overtighten.

Warranty

The product has a warranty period of 30 years.