02 December 2011

Israeli Accessories on Czech Rifles



FAB Defense makes Rifle Accessories to fit the VZ58.   
  The SA Vz.58 is a gas operated, magazine fed, selective fire weapon. It uses more or less conventional short stroke gas piston, located above the barrel. The gas piston has its own return spring. The locking system features a linearly moving bolt (breech block) with a separate tilting locking piece. The breech block (bolt) is located under the bolt carrier, and the locking piece is hinged to the bolt and located under it. The VZ58 fires from the closed bolt all times. When gun is fired, the gas piston gives a short tap to the bolt carrier. After a free movement of about 22 mm (.9 inch) the bolt carrier swings the locking piece upfrom the locking recesses in the receiver, and thus unlocks the bolt. From this moment on the bolt group moves back at once, extracting and ejecting the spent case and chambers a fresh cartridge. At the end of the return stroke the bolt stops in the forward most position against the breech face, while the bolt carrier continues to move forward, swinging the locking piece down and into the locking recesses, thus locking the bolt to the receiver.

The overall system can be roughly described as a mix between the Walther P-38 pistol and the CzechZB-26 (or British Bren) machine gun locking.

The charging handle is attached to the right side of the bolt carrier.

The trigger / hammer unit also differs from the most common designs in that it is a striker fired design. The massive cylindrical striker is located at the rear, hollowed part of the bolt, and has its own spring located under the bolt group return spring. The striker has a lug that interacts with the sear and is used to hold the striker in the cocked position. The overall design of the trigger unit is relatively simple and has few moving parts. The safety / fire mode selector switch is located at the right side of the receiver, and has 3 positions for safe, single shots and full automatic fire.






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