Aug 22, 2008 In 1939 (which for our American readers is when the war really started) APCR or HVAP – Armour Piercing Composite Rigid or High Velocity .
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Muzzle velocity, 860 m/s (2,800 ft/s) HE/M; 940 m/s (3,100 ft/s) APCR. The Rheinmetall-Borsig MK 103 ("MK" - Maschinenkanone) was a German 30 mm caliber The operating mechanism differed from the recoil-operated.
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A kinetic energy penetrator is a type of ammunition designed to penetrate vehicle armour. Once the shell clears the barrel, the sabot is no longer needed and falls off in pieces. High-velocity armor-piercing (HVAP) rounds were also introduced by the United States Army, and were primarily used by tank destroyers.