STG44
The Sturmgewehr 44 was a relatively cheap and powerful infantry automatic weapon. It vastly increased the soldier's volume of fire. This was the first true assault rifle and the model for all subsequent infantry weapons. The AK-47, in particular, was inspired by the STG-44, though it AK had many innovations. Nevertheless, the STG was the model and every infantry weapon since 1944 has used the concepts it pioneered.