BRNO ZKK 600

The History of Brno

The history of the Brno company or Czechoslovak Armory (Československá zbrojovka) as it was known prior to WWI, began in the city of Brno in the Czech Republic, formerly known as Czechoslovakia. In 1918, the Brno Rifles factory was established. Before 1918, Brno Plant was an arsenal located in the Austro-Hungarian Empire. Brno started producing Mauser 98 rifles in 1920 after buying excess weapons and equipment from Mauser-Oberndorf. These Brno-produced Mausers had a 98/22 designation stamped onto the receivers marking the year of production.

In the period between WWI and WWII, Brno collaborated with the Royal Small Arms Factory in Enfield, England to develop a well-known Bren light machine gun. They produced weapons for the Czechoslovakian and German armies during World War II. After the war, the company was nationalized by the Czechoslovakian government and renamed Zbrojovka Brno. While it was under socialist control until 1989, it switched to the production of sporting weapons which quickly gained a reputation for their reliability. For some time, the company also produced light artillery and several other products such as tractors, typewriters, and early computers.

During the years they presented numerous models of weaponry such as the ZB vz. 26 light machine gun, ZB-50 heavy machine gun, the MG34, several bolt action rifles, ZKM and ZH series, ZKR 551 handgun etc.

The company was privatized in 1990, just three years before Czechoslovakia split into the Czech Republic and Slovakia. Zbrojovka Brno was acquired by Česká zbrojovka (CZ) in 2008. With the new ownership, they agreed to a longer lease, which allows the business to continue production in rented facilities. They still make high-end products for hunting and competition, including pistols, single-shot and double rifles, combination rifles, as well as over/under shotguns.

Brno ZKK 600 (Standard) Rifle Review

Brno ZKK is a series of Czech bolt-action rifles designed and introduced in the early 1960s as a replacement for the vz. 52 rifles. There are three models available in the series, namely ZKK 600, ZKK 601 and ZKK 602, each with a different action length and chambered for a different caliber group. The three models also have somewhat differently shaped stocks; however, apart from those differences, they are structurally the same.

Brno ZKK 600 is the standard-action version of the three models. The rifle has an internal box magazine with a capacity of up to five rounds, a long claw extractor, and a Mauser-style breech system. High-grade steel makes up the controlled-feed action system, which has a bolt with three locking lugs: two bigger, main lugs at the bolt head, and a third, smaller safety lug underneath the bolt handle that serves as a backup and adds extra safety when the bolt locks into the receiver.

Behind the bolt handle on the rear right side of the receiver, there is a two-position safety lever that locks the trigger mechanism while also blocking the bolt in the closed position. Additionally, the protrusion on the rear part of the striker from the bolt shroud also indicates when the rifle is cocked, and the striker is activated. Both standard and single-set triggers are available. Users can manually adjust the weight of the trigger pull by turning the screw accessible through the upper side of the receiver when the bolt is removed.

The front sight is mounted on the ramp and secured in place by a spring-loaded catch allowing for easy and fast removal. The rear sight which is adjustable for windage is attached to the dovetail and secured by indentation. Brno ZKK 600 comes with 19 mm milled dovetail grooves at the top of the receiver which are suitable for installing scope mounts.

Brno ZKK 600

Figure 1: Brno ZKK 600, chambered for .30-06 Spr. (Source: https://greatnorthgunco.ca/product/brno-zkk-600-30-06-6/)

Brno ZKK 600 Calibers

The rifle is chambered for the following calibers:

6.5x55
.270 Win.
7x57
7x64
.30-06 Spr.
8x57 S

Brno ZKK 600 comes with milled 19 mm dovetail grooves at the top of the receiver which are suitable for installing scope mounts. The recoil notch is positioned on the left side of the rear mounting surface.

The receiver of Brno ZKK 600

Figure 2: The receiver of Brno ZKK 600, chambered for .30-06 Spr. (https://greatnorthgunco.ca/product/brno-zkk-600-30-06-6/)

The mounting surface of Brno ZKK 600

A: /

B: /

C: /

D: 19 mm

BHU: 0 mm

Ø: /

R1: Prisma 19

R2: Prisma 19

Scope Mounts Interchangeable With Brno ZKK 600

Rifles That Have One-Piece Scope Mounts Interchangeable With Brno ZKK 600

For one-piece mounts to fit on a rifle, mounting surfaces on these rifles must match in every dimension. Rifles that have one-piece mounts interchangeable with Brno ZKK 600 are the following:

Rifles That Have Two-Piece Scope Mounts Interchangeable With Brno ZKK 600

For two-piece mounts to be interchangeable, the mounting surfaces of the rifle must match in every dimension except the action length which can vary. This is because of the distance between the two pieces of the mount which is not fixed. If the Scope mount comes with a recoil stopper that cannot be removed, it must match the position of the notch on the receiver. Rifles that have two-piece mounts interchangeable with Brno ZKK 600 are the following:

Best Scope Mounts for Brno ZKK 600

Fixed Scope Mounts for Brno ZKK 600

These scope rings with bases are made by the German company MAK. They have a thirty-year warranty and are constructed of premium steel.

Detachable Repeatable Scope Mounts for Brno ZKK 600

Installing detachable sight mounts on the rifle is quick and simple, making them particularly handy for maintenance. This two-piece repeatable pivot mount made by the German company EAW is a suitable choice for your Brno ZKK 600.

Picatinny Rails for Brno ZKK 600

If you are considering converting your 19 mm dovetail to Picatinny, this mounting solution might suit your needs. The Rusan Picatinny rail is made in Croatia and comes with a ten-year warranty.

Help Us Build Our Riflescope Mounts Database

If you happen to own this or any other rifle, we would appreciate it if you could help us expand our database by sending us some photos of the rifle receiver (the bare mounting surface of the rifle without the scope mounts installed). For your help, our company offers a fair return in terms of practical rewards.

Please send us an email for more information. You can contact us here: info@optics-trade.eu

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VIDEO

Introduction

In recent years we can observe that a trend of Picatinny rail has become widespread and global. It is driven by the NATO standardized rails, more commonly known as the Picatinny rail standard. Picatinny rail being the New Jersey Arsenal that developed it in 1995.

These mounting options are revolutionary. The biggest and best advantage being that the Picatinny rail can be used its entire length and not bordered to a few pre-designed slots like for example the Weaver rail standard was before.

The other main advantage is the ease of use and interchangeability. If a product is meant for a Picatinny rail design it will fit all Picatinny-rails, no matter the manufacturer or date of production.

Picatinny/Weaver Rail

Picatinny Rail and Weaver rail profile

Design

The Picatinny rail is almost exclusively crafted from a single piece of metal (in some cases aluminum). In this manner, the axis of the Picatinny rail is perfectly straight and aligned with the axis of the firearm. Therefore the rifle scope which is mounted onto this kind of configuration is certainly aligned with the rifle / gun and the trajectory of the ammunition.

Weaver rail design on the other hand is usually manufactured in two separate pieces, greatly increasing the possibilities for the axis to be crooked, overlapping, and out of line.

It is always harder to align two separate pieces to a third line than it is to align one piece to another. In this way, the lapping of two mounting rings on a single-piece Picatinny rail is no longer required.

The single-piece rail will assure that both rings are perfectly aligned to each other and that no unwished stress is transferred to the riflescope.

Picatinny compare to Weaver Rail

The Picatinny rail itself is an evolutionary step forward from the older Weaver rail. The main difference between Picatinny rail and Weaver rail is the spacing of the slots. Picatinny rail design has them evenly placed exactly 5.23 mm from one slot to the other, 3 mm deep. For this reason, the mounting options are repeatable and the same as other firearms using the Picatinny rail standard.

Interchangeability was a major driving force in the development of the new standard as different NATO armies need to be compatible with each other.

Weaver rail has 3.8mm wide slots and these slots can be placed anywhere on the Weaver rail and in any number that the producer wished.

Advantages of Picatinny design

A big advantage for using the Picatinny rail design is the ever-present recoil stop. Furthermore, the manufacturing of the rail is not very technically demanding and can be done without the use of state-of-the-art machines which greatly reduces the cost of the finished product, making it very affordable.

The Picatinny rail is easy to mount and usually, this type of configuration does not transfer negative stresses and forces from the fired weapon to the rifle scope.

In addition, the Picatinny rail with its very long useable surface works well for mounting longer rifle scopes or to achieve optimum eye relief.

The durability and toughness are other big pluses for this solution.

Manufacturers of Popular Models

A majority of the Picatinny rings are fixed, but a number of best rated European manufacturers (EAW, MAK,..) have, in recent years, put a lot of effort into the development of detachable ring with100% repeatability, with which it becomes easy to remove the scope from the weapon without the use of tools.

No re-zeroing is needed with such mount options, but these models tend to be expensive.

Weaver and Picatinny Rings

Picatinny rail and weaver rail share one more thing. It is possible to use the Weaver ring and the Picatinny ring on the Picatinny-rails, but it is usually impossible to use the Picatinny ring on the Weaver base. The reason being the above-mentioned positioning and spacing of the slots.

Picatinny mounts have a 5mm recoil stop that goes into the rail slot and since
Weaver rail only has 3.8mm wide slots such rings do not fit on Weaver rails.

Due to this reason, the Picatinny-rails are popular and prevailing on the market in recent years and eventually, these options will completely oust the Weaver rail from the market.

BRNO ZKK 600

The History of Brno