Merkava Mk4 represents the third evolutionary phase of the Merkava program. The Mk4 is equipped with a 120 mm gun but the new gun is designed to sustain higher pressures, generating higher muzzle velocities which are an essential feature for advanced kinetic energy ammunition. The Merkava Mk4 can accommodate various 120mm ammunition types, including 120mm APFSDSFS kinetic rounds, and their training derivatives, HEAT hollowcharge types and antipersonnelantimaterial ammunition which have already been used in combat operations with previous Merkava types

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