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Breech Block system


Breech block system assembly with ballistic test barrel serves for shooting of cartridges
up to caliber 25mm. Breech block system is designated for clamping on STZA-25 Fixed firing rest. Breech block system works as a single-action manually operated weapon provided with a screw breech block. A percussion mechanism cocking by electro magnet. Withdrawal and ejection of the cartridge case is manual.

Technical parameters

Caliber rangefrom 20 to 25 mm
Breech block thread TR75x4
Operating temperature rangefrom -25 °C to +40 °C
Input voltage of Electronic box AC 230 V
Length of cable of remote firing box 25 m