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 exclusively from steel 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.
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 action models are chambered for 7mm Rem. Mag., .300 Win. Mag. and .338 Win. Mag.
BBR stands for Browning Bolt-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 the 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
R1: R34 (35.6)
R2: R34 (35.6)
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.
The product has a warranty period of 10 years.
|Mount series||Rusan Picatinny Bases|
|Suitable for||Browning A-bolt (LA)|
A, B and C markings refer to the distances between holes on the rail/mount. A is the distance between the front two holes on the rail/mount.
A, B and C markings refer to the distances between holes on the rail/mount. B is the distance between the holes in the middle (usually, that is the distance between the 2nd and 3rd hole on the rail/mount).
A, B and C markings refer to the distances between holes on the rail/mount. C is the distance between the rear two holes on the rail/mount.
BH stands for Bauhöhe (ger.) which means overall height. It is measured from the mounting surface of the rifle to the lower surface of the riflescope's tube.
Often, the elevation adjustment that the riflescope offers is not adequate to compensate for the bullet drop when shooting at long range. When the riflescope runs of out of elevation, a mount with an inclination is needed. 20 MOA is the most common inclination. With it, the user gains 58.2 cm / 100 m of additional elevation range when shooting at the range of 100 m. This is approx. 5.8 Mrad of elevation.
(Posted on 09/01/2017)