Origin
Germany
The FG 42 (German: Fallschirmjägergewehr 42, "paratrooper rifle 42") is a selective-fire battle rifle produced in Nazi Germany during World War II. The weapon was developed specifically for the use of the Fallschirmjäger airborne infantry in 1942 and was used in very limited numbers until the end of the war. It combined the characteristics and firepower of a light machine gun in a lightweight form no larger than the standard-issue Kar 98k bolt-action rifle. Considered one of the most advanced weapon designs of World War II, the FG 42 influenced post-war small arms development, and most of its design was copied by the US Army when they developed the M60 machine gun

Girls' Frontline
Girls' Frontline is a mobile strategy game developed by MICA Team, a Chinese company. It is a moe anthropomorphism game in which the player controls echelons of characters, each of which are based on actual guns. The game was released in Mainland China on 20 May 2016, and in Hong Kong and Taiwan on 18 January 2017. It was also released in South Korea on 30 June 2017. The English version published by SUNBORN Network Technology was released on May 8, 2018. This game is a prequel of another game developed by the same company called Bakery Girls.