The AG4 ingame or its IRL counterpart AK4 has its sights mixed up, looking more like a AK-47 or Bolt action rifle iron sight while in reality the sights are different. infact there is other differences but im just going to focus on the iron sights
Av Armémuseum - Armémuseum: AM.067811, CC BY 4.0, File:Automatkarbin 4.jpg - Wikimedia Commons
This is a Standard Swedish Automatkarbin 4 produced from/to 1965–1980
Produced in Husqvarna Vapenfabrik och Carl Gustafs stads gevärsfaktori
Borrowed from user tene
Borrowed from user Sampardan
Taken by me