By mid-1940, Germany introduced the first HEAT round to be fired by a gun, the 7.5 cm Gr.38 Hl/A, (later editions B and C) fired by the KwK.37 L/24 of the Panzer IV tank and the Stug III self-propelled gun . In mid-1941, Germany started the production of HEAT rifle-grenades, first issued to paratroopers and, by 1942, to the regular army units ("Gewehr-Panzergranate 40", "46" and "61"), but, just as did the British, soon turned to integrated warhead-delivery systems: In 1943 the "Püppchen", "Panzerschreck" and "Panzerfaust" were introduced.