Contessa Picatinny Rail for Sako A7 M B: 95.6 mm (L/XL action) 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.

Contessa is an Italian company, famous for producing aesthetically appealing mounts with a nice finish. The tolerances of the produced pieces are very tight – there are no deviations, the mounts are very carefully machined. Contessa's Picatinny rails are made from steel and come with their unique screws which fit nicely into the rail. The screws have a huge contact surface and a bigger head than screws of other mount manufacturers, while the thread is the same. Contessa's Picatinny rails, made in Italy, are available in both 0 MOA and 20 MOA versions. Throughout the middle of the rail, there is a canal so that the rail can be used together with rifle's sights.

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

Sako or Civil Guard Gun-Machining works LTD is a Finnish firearm producer located in Riihimäki. It was founded in 1919 as a workshop for repairing military rifles left from WW I. In 1921, it became an independent commercial enterprise. They started exporting pistol cartridges to Sweden in the 1930s. After WW II, Sako started manufacturing rifles. Their first invention was the Model L-42 rifle (patented in 1942), followed by L-46 in 1949. For a short period of time, Sako Firearms also produced lever-action rifles (Finnwolf) and rimfire rifles (Finnscout). Over the decades, Sako produced more than 40 different models of firearms with various rifle chamberings. The company was owned by a series of owners. Currently, the owner of the company is an Italian firearms holding company Beretta Holding. In 2013, Sako reached a new production record of over 100.000 rifles produced.

Sako A7 is a bolt-action rifle. There are four holes bored onto the receiver – 2 at the front side and two at the back side. There are three locking lugs on the bolt which operates on a 70-degree lift. A7 is equipped with a detachable 3-round magazine. There are many versions available: Synthetic, Synthetic Stainless, Roughtech Pro and Roughtech Range. When purchasing the rifle, the buyer can choose between S and M versions as far as concerns the length of the action and barrel length. S models are chambered for .22-250 Rem., .243 Win., 7mm-08 Rem., .308 Win., .270 Win Short Mag. and .300 Win. Short Mag. M models are chambered for .25-06 Rem., .270 Win., .30-06 Sprg., 7mm Rem. Mag. and .300 Win. Mag. Unlike other Sako rifles, A7 does not have a dove-tail on the receiver. The B length of the M models varies: some have a B length of 84.8 mm while others have a B length of 95.6 mm. Make sure to check the B length on your rifle before you order a Picatinny rail. This Picatinny rail is suitable for Sako A7 M rifles with a B distance of 95.6 mm.

A: 21.9 mm
B: 95.6 mm
C: 21.9 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.