The Callup, (Swedish: "Repmånad"), is a Swedish comedy from 1979. It follows a squad of former soldiers during their obligatory one-month military refresher course (known as "Repmånad").
The following firearms were seen in the film "The Callup"/"Repmånad".
The primary weapon of the characters is the Swedish Carl Gustav M/45B SMG. Most of the time it's seen with a special blank-firing device
and a brass-catcher.
Heckler & Koch G3A3/Ak 4
Though the main characters use the older M45 SMG, some of the extras use the Ak 4, a Heckler & Koch G3A3 modified for the needs of the Swedish Military.
In a dream sequence, a soldier is seen with an unknown SMG. It is possible the weapon is a Bergmann MP18 or Haenel-Schmeisser MP28/II. Possibly the Smith & Wesson M76.