EAW Steel Picatinny, Mossberg 500

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

Mossberg 500 is a series of shotguns, first introduced in 1960 – models included in this series are 500, 505, 510, 535 and 590. The breech is secured by a single locking lug. Most of these models have four holes pre-drilled on the receiver for mounting purposes – two at the front and two at the rear. These shotguns are designed to be used in harsh situations, which is why they are simple to clean and take care of. The receiver is made of aluminum. Standard model from this series of shotguns holds five 70 mm or 76 mm shells plus one in the chamber. The user can choose from 12 gauge, 20 gauge and .410 bores (16 was also available but is now discontinued).

The difference between model 500 and model 590 is mainly in how magazine tube is designed. Model 500's magazine is closed at the muzzle-end; while 590's magazine is opened at the muzzle-end.

Mossberg 835, the Ulti-Mag. model, is a more expensive version of model 535. Much of 835 is based on the 500 series. 835 features an overbored and ported barrel, dual action bars, dual extractors, anti-jam shell elevator and an 89 mm (3.5“) chamber. A large locking lug connects the bolt and the barrel. The receiver is made of aluminum to keep the weight of the rifle well-balanced. Since this is the Ulti-Mag. series, there is only a 12 gauge bore available. There are four holes drilled on the receiver for mounting purposes – two at the front and two at the rear.

Mossberg models 500, 535 and 835 have actions of same dimensions, which is why they share the same mounts.

A: 12.8 mm
B: 54 mm
C: 12.8 mm
BHU: 0 mm
Fi:
R1:
R2:

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.