The STG-58, is a Austrian battle rifle that was based on the famous Belgian FAL which was adopted in early and mid 1950s. The STG-58 was used by the Austrian Army from 1958 until 1977. The STG-58 stands for Sturmgewehr 1958 which the 1958 is the year when Austrians adopted the rifle. The STG-58 shoots a 7.62 NATO that is more powerful than the AUG that shoots a 5.56 NATO. In 1978 the Austrian Army replaced the STG-58 with the AUG.