[2] Competing at the 2021 European Shooting Championships in Croatia, Larsen won an individual gold medal in 50 m rifle prone.

[4] He won a silver medal in 50 m rifle 3 positions team, along with Jon-Hermann Hegg and Simon Claussen.

[1] At the 2022 ISSF World Shooting Championships in Cairo he won a gold medal in 50 m rifle 3 positions team, along with Simon Claussen and Jon-Hermann Hegg, after defeating a French team in the final match.

[7] Competing at the 2023 ISSF World Shooting Championships in Baku, he won the team gold medal in 50 m rifle prone, along with Ole Martin Halvorsen and Jon-Hermann Hegg.

[8] He won a bronze medal in 50 m rifle 3 positions team, along with Ole Martin Halvorsen and Jon-Hermann Hegg.