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ERA-TAC picatinny rail - Sako 75 / MAO5 IV / V, 85 / MAO05 M / L

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ERA-TAC picatinny rail - Sako 75 / MAO5 IV / V, 85 / MAO05 M / L Details

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.

Recknagel is currently the biggest manufacturer of mounts in Germany. Their Picatinny rails, known for great fit and finish, are mostly made of high-grade aluminum (a few are also made of steel), which is why they are very reliable. Screws are included. Currently, a common trend among rifle manufacturers is making receivers out of aluminum – mounting a Picatinny rail made of aluminum on one of those receivers is thus not problematic. Their products are marketed either under the name Recknagel or Era-Tac.

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 decades, Sako produced more than 40 different models of firearms with various rifle chamberings. The company was owned by a series of owners. Currently, 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 85 is a bolt-action rifle with a controlled-feed action. Similarly to other Sako rifles, model 85 has a conical dove-tail on the top of the action which tapers towards the rear part of the receiver – for mounting purposes (front dove-tail base is wider than the rear dove-tail base). There are no mounting holes. Barrels are drilled, honed and cold-hammer forged. Sako 85 features a recoil stop at the rear mounting surface.

Sako 85 rifles come in six action sizes: XS, S, SM, M, L, and XL. This mount is suitable for Sako 85 with action size M (medium), which is chambered for .25-06 Rem., .270 Win., .30-06 Sprg., 6.5x55 SE, 7x64, 8x57 IS, 9.3x62 and 9.3x66 Sako. It is also suitable for Sako 85 with action size L (large), chambered for .300 Win. Mag., .338 Win. Mag., .375 H&H, and 7mm Rem. Mag.

This mount will fit rifles Sako 75 with actions IV and V as well.

This Picatinny rais suitable for two action lengths because of its unique design. The front mounting surface of the rail can be regulated for the rail to fit either Sako 75 IV, V, Sako 85 M or L.

Sako 85 is available in six action lengths. When a rifle is available in more than one action length, only two-piece mounts are interchangeable between these rifles (a two-piece mount made for Sako 85 M can also be mounted on Sako 85 XS, S, SM, L, and XL). One-piece mounts will only fit a rifle with a specific action length (a one-piece mount made for Sako 85 M will not fit Sako 85 XS, S, SM, L and XL).

Rifles Sako Forest-Finnbear, Vixen and models 75/85 have similar actions. This is why, for example, two-piece mounts made for Sako Forest-Finnbear will fit rifles Sako Vixen and models 75/85 while one-piece mounts made for Sako Forest-Finnbear will not fit rifles Sako Vixen and models 75/85. These rifles do not have mounting surfaces with radiuses since they have a dove-tail on the receiver. Sako dove-tails are conical – they taper towards the rear part of the receiver.

Mounting details

A: / (no holes)
B: / (no holes)
C: / (no holes)
BHU: 0 mm
Fi: /
R1: Prisma
R2: Prisma

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.

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ERA-TAC picatinny rail - Sako 75 / MAO5 IV / V, 85 / MAO05 M / L Specifications

ManufacturerERA-TAC
SKU57050-0114
Mount seriesERA-TAC Picatinny Rails
Base typePicatinny
Suitable forSako 75, Sako 85 L, Sako 85 M
A

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,C distances

/ (no holes)
B

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, C distances

/ (no holes)
C

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.

A, B, C distances

/ (no holes)
BH height

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.

BH height

12.5 mm
Inclination

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.

0 MOA
MaterialAluminium
Length179 mm
Warranty10 years
Made inGermany
ColorBlack
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Reviews for ERA-TAC picatinny rail - Sako 75 / MAO5 IV / V, 85 / MAO05 M / L

Excellent By
Quality
Price
Value
5
I've tried several picatinny rail manufacturers on my six Sako rifle. I rank ERA-TAC (Recknagel) highest.

There are two reasons:
1- Technical design providing the best grip. I have one of these on 30-378Wby which has heavy recoil compared to more common calibers.
2- Superior product support, I had problem of finding the right hexagon socket due the difference of US/EU imperial/metric sizing for the smaller screws. The factory responded with a day. (Right answer is 2,5mm).

The only thing I would change on this product is making it a quarter of an inch shorter. This way the rail length would be an exact match of the Sako receiver. However there might be a good technical reason why they designed the rail to this length which of course supersedes the visual imbalance.

For Sako 75, 85 or M995 (TRG-S) this is the best choice I have found so far. Optics trade had the best price I was able to find.

(Posted on 24/11/2016)

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