The Germans had experimented with selective-fire carbines firing rifle cartridges during the early years of World War II. These were determined to be less than ideal, as the recoil of full-power rifle cartridges caused the weapon to be uncontrollable in full-automatic fire. They then developed an intermediate-power cartridge round, which was accomplished by reducing the power and the length of the standard 7.92×57mm Mauser rifle cartridge to create the 7.92×33mm "kurz" (short) cartridge. A selective-fire weapon was developed to fire this shorter cartridge, eventually resulting in the Sturmgewehr 44, later translated as "assault rifle" (also frequently called "machine carbines" by Allied intelligence, a quite accurate assessment, in fact). Very shortly after World War II, the USSR adopted a similar weapon, the ubiquitous AK-47, the first model in the famed Kalashnikov-series, which became the standard Soviet infantry weapon and which has been produced and exported in extremely large numbers up through the present day.