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CZ firearms or CZ (which stands for Česká zbrojovka) is based in Uhersky Brod, a small town in the southeastern Czech Republic. CZ has its start in 1936 as a subsidiary of CZ Strakonice, which was itself a subsidiary of Zbrojovka Brno. The arms industry was growing quickly in Czechoslovakia at the time, and Uhersky Brod was chosen since it was secluded and lay beyond the range of German bombers, which, in case of an invasion, would target the arms factories first. The factory initially mostly produced pistols and small-caliber rifles; however, when German forces occupied Czechoslovakia in 1939, the company was renamed to Böhmische Waffenwerke and was forced to make machine guns, such as LK-30 and MG-17, for the German military.
After the end of World War II, the Soviets gained control of the region and the company was nationalized by the communist government, producing air weapons, machine guns, submachine guns, motorcycle and sewing machine parts. In 1957 the company started production of the Model 58, and in 1961 they introduced the world-famous Model 61 Škorpion machine pistol. The year 1975 marked the release of yet another popular model, the CZ 75 pistol which many manufacturers have since used as basis for their own products.
CZ once again became an independent company in 1992 following the fall of the Soviet Union. In the decades after, they have continued production of a variety of weapons seizing the market of law enforcement and military firearms with service pistols, assault rifles and grenade launchers with which they also helped equip the Czech army. They have strived to widen their presence on the international markets, opening a facility for assembly and repairs of CZ pistols in Peru and spreading production of their firearms (certain models of the CZ-P10 pistol) to the United States in 2019. As of 2021 they employed around 1500 workers.
CZ 557 is an upgrade of the popular CZ 550 rifle with some notable differences. 550 featured a controlled-feed action but that is no longer the case with 557 which is equipped with a cylindrical push-feed bolt with two locking lugs, a short extractor, and a plunger ejector. The barrel is cold hammer-forged and factory-lapped which provides greater accuracy. While CZ 550 had a set trigger, the 557 comes equipped with a fully adjustable trigger mechanism. It features an internal box magazine with a hinged floorplate while the release is located on the front of the trigger guard. Depending on the variant, it came with a stock made of walnut, beech, polymer or laminated wood. The CZ 557 series was discontinued in 2021. It was sold in short-action and long-action models.
Figure 1: CZ 557 Sporter .30-06 Spr. Source: https://www.northwestfirearms.com/threads/cz-557-sporter-30-06-w-carbon-fiber-manners-stock.301349/
CZ 557 LA is chambered for the following calibers:
Caliber choice depends on the variant
CZ 557 LA is available in the following variants:
CZ 557 comes equipped with a 19 mm dovetail rail milled on the front and rear of the receiver. The recoil notch is located under the rear mounting surface, to the left. The dovetail is flat on top.
Figure 2: CZ 557 Predator .30-06 Spr. long action receiver
Figure 3: CZ 557 receiver
A: /B: /C: /D: 19 mmBHU: 0 mmØ: /R1: Prisma 19R2: Prisma 19
For two-piece mounts to be interchangeable the mounting surfaces of the rifles must match in every dimension except the action length which can vary. This is because the distance between the two pieces of the mount is not fixed. If the mount has a recoil stopper, it must fit the recoil notch on the receiver. Rifles that have two-piece mounts interchangeable with CZ 557 LA are the following:
The necessary condition for rifles to have one-piece mounts interchangeable is that the mounting surfaces of these rifles match in every dimension. Rifles that have one-piece mounts interchangeable with CZ 557 LA are the following:
Here we recommend a two-piece mount from MAKipp since it is relatively practical and inexpensive.
This detachable repeatable mount from INNOMOUNT is both good-looking and high-quality.l
We recommend this Picatinny rail from Optik Arms since it is sturdy and inexpensive.
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 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: [email protected]
