Origin
German
The Karabiner 98 kurz (carbine 98 short, often abbreviated as Kar98k, K98, or K98k) is a bolt-action rifle chambered for the 7.92×57mm Mauser cartridge that was adopted on 21 June 1935 as the standard service rifle by the German Wehrmacht. It was one of the final developments in the long line of Mauser military rifles. Although supplemented by semi- and fully automatic rifles during World War II, it remained the primary German service rifle until the end of the war in 1945. Millions were captured by the Soviets at the conclusion of World War II and were widely distributed as military aid. The Karabiner 98k therefore continues to appear in conflicts across the world as they are taken out of storage during times of strife.

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.