Generate a correct and concise answer for the question based on the words in the context.

Context : The Automatgevar m/42 (Ag m/42, outside of Sweden commonly known as the AG42, AG-42 or Ljungman) is a Swedish semi-automatic rifle which saw limited use by the Swedish Army from 1942 until the 1960s.
Question : What was the year that Ag m/42 entered service?
1942