Rusan Picatinny rail - Browning A-bolt, Eurobolt (LA), 20 MOA

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.

Rusan, a company from Croatia, is one of the manufacturers of Picatinny rails. They make mounts from steel and aluminium and provide buyers with a wide selection of Picatinny rails for various rifles. They are made from high quality deep blue finish steel. Picatinny Rails include screws with appropriate thread for the corresponding rifle. Rusan covers 10 years of warranty for all its products.

20 MOA Inclination

20 MOA inclination is only needed when the scope runs out of elevation. For example, when shooting at the range of 100 m, shooter gains 58.2 cm / 100 m of additional elevation range with a 20 MOA mount. This is approximately 5.8 Mrad of elevation. To make things even clearer – if the target was placed at 100 m, the scope with 20 MOA inclined rail would aim to the center of the target while the rifle’s barrel would aim 58 cm higher than the scope. This gives the shooter extra elevation needed for long range shooting. If you plan to shoot on distances longer than 600 meters, use of rail with 20 MOA is greatly recommended. There is no negative effect of the inclined Picatinny rail in the mounting setup if you only shoot on shorter distances. The same goes also the other way around, since if you don’t shoot on extreme distances then Picatinny rail with inclination is not needed.

About the rifle

Browning Arms Company is a manufacturer of firearms and fishing gear with headquarters in America. They offer a wide selection of firearms and are most known for the following firearms: BPS shotgun, A-bolt rifle, X-bolt rifle, BAR semi-automatic rifle and Auto-5 semi-automatic shotgun.

Browning A-bolt is a bolt-action rifle that was introduced to the public in 1985. It is available in many calibers and versions. There are three locking lugs in the front of the receiver. A-bolt series received an upgrade in 1994 when A-bolt II range was launched – some of the characteristics, including bolt and trigger mechanism, were modified, but the models retained their names. Short action A-bolt models are chambered for .243 Win., .257 Roberts, 7mm-08 Rem. and .308 Win; long action A-bolt models are chambered for .25-06 Rem., .270 Win., .280 Rem. And .30-06 Spr; heavy duty long long action models are chambered for 7mm Rem. Mag., .300 Win. Mag. and .338 Win. Mag.

BBR stands for Browning Bold-action Rifle. It was made from 1978 to 1984 in Japan. To unlock the bolt, the user has to lift the bolt for 60 degrees. There are pre-drilled holes on the top of receiver for mounting purposes – 2 at the front and two at the rear. The barrel is free-standing, meaning that it has no support forward from the chamber other than a light alloy bracket. They chambered this rifle for .270 Win., 7mm Rem. Mag., .30-06 Sprg., .300 Win. Mag., and .25-06 Rem.

Browning A-bolt LA (long-action) and BBR have actions of same dimensions, which is why they share the same mounts.

A: 21.84 mm
B: 98.16 mm
C: 21.84 mm
BHU: 0 mm
Fi: 6-48
R1: R34 (35.6)
R2: R34 (35.6)

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 10 years.