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Contents • • • • • • Description [ ] The CZ 52 pistol is a –operated, detachable box magazine–fed, single-action, semi-automatic pistol chambered for the cartridge (the gun was originally designed for but due to political pressures had to be redesigned for the then-standard Soviet pistol cartridge). It weighs approximately two unloaded. Military models feature either a finish or a gray oxide coating, while some CZ 52s were arsenal reblued in the 1970s. These re-finished guns are usually marked as such.

Ergonomically, the grip of the CZ 52 is long when measured from front to rear and slim from side to side with a low 'hump' which meets the web of the hand at the rear. This causes the bore axis to sit high above the grip, resulting in a very strongly felt recoil. Due to its high muzzle velocity and projectile shape, ammunition fired from the CZ 52 pistol is known to reliably penetrate. Operation [ ] The CZ 52's operating controls consist of a trigger, an external hammer, a magazine catch located at the heel of the grip frame, and a combination lever located on the left rear side of the receiver aft of the left grip panel.

The manual safety blocks movement of the sear, which prevents the hammer from releasing and firing a round. A second safety, in the form of a spring-loaded firing pin block, prevents the pistol from firing unless the trigger is pulled fully to the rear; this feature renders the pistol 'drop safe'.

However, if the firing pin block spring has become worn, the pistol may be rendered unsafe in the event of a muzzle down drop, or in the case of other internals being worn, it may be drop safe only when 'cocked and locked', for instance. Care should be taken when handling firearms of uncertain origin, and only a competent gunsmith should be relied upon to verify the safety mechanisms of surplus guns are intact. Because the sear must overcome the additional spring pressure of the firing pin block, an inherent feature of the CZ 52 is its unusually heavy trigger pull, often in the 8–10 range. The hammer is of the rebounding type, meaning that it does not contact the firing pin while in its uncocked position, and cannot do so unless the trigger is pulled, another safety feature. It should be noted that using the decocker relies on the integrity of firing pin block; if the firing pin block is worn, an unintentional discharge can result when the decocker is engaged.

After a full magazine is inserted, the slide is fully retracted and released. This action cocks the hammer, strips a cartridge from the magazine, and chambers it. Rotating the three-position safety lever fully downward, exposing a red warning dot between the receiver and the hammer pivot pin, renders the pistol ready to fire. Rotating the lever upward to its center position covers the red dot and engages the sear block (allowing 'cocked and locked' carry).

Finally, rotating the safety lever fully upward decocks the hammer by releasing the sear and intercepting the hammer's forward movement. This position allows safe carry of the pistol with a round in the chamber.The hammer must then be cocked manually and the safety disengaged before a round can be fired. As the trigger is pulled in this state, the trigger bar rotates the sear, a lug on the sear disengages the firing pin safety located directly above it, and the opposite side of the sear releases the hammer.

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The hammer then impacts the firing pin, the firing pin impacts the primer of the cartridge, and the shot is fired. The CZ 52 utilizes a fairly uncommon variety of the operating system in which two vertical are used to lock the barrel and slide together, via a cam block. This is similar to the system used in the German. This arrangement results in a strong lockup which, conventional wisdom holds, allows the loading of higher pressure ammunition (such as ammunition intended for use in a submachine gun) with higher velocity and energy than compatible ammunition manufactured for pistols of a similar caliber in other Warsaw Pact countries. When cocked, loaded, and closed; the recoil spring, positioned coaxially around the barrel, provides the pressure necessary to lock the barrel and slide together via the rollers. When a round is discharged, the barrel and slide recoil together while the cam block is held stationary by a lug in the receiver. After traveling rearward a short distance (about 0.16' or 4 mm), the rollers are allowed to disengage from the slide via recesses in the cam block.

At this point, the slide is free to continue rearward, cocking the hammer, extracting the spent case from the barrel's chamber, and ejecting it clear of the pistol. After reaching the end of its stroke, the slide is returned to cocked and loaded by the compressed recoil spring, again collecting a fresh cartridge from the magazine and inserting it into the chamber. When the magazine is empty its follower presses against an externally mounted slide catch and holds the slide open.