Origin
Nazi Germany
The StG 44 (abbreviation of Sturmgewehr 44, "assault rifle 44") is a German selective-fire rifle developed during World War II. It is also known under the designations MP 43 and MP 44 (Maschinenpistole 43, Maschinenpistole 44 respectively). The StG 44 was the first successful and widely produced design to use a new shorter cartridge, which permitted controllable automatic fire from a weapon more compact than a battle rifle, coupled with the recognition that most aimed rifle fire in combat situations did not exceed a few hundred metres. By all accounts, the StG 44 fulfilled its role admirably, particularly on the Eastern Front, offering a greatly increased volume of fire compared to standard infantry rifles. However, it came too late to have a significant effect on the outcome of the war. Its lasting effect was its major impact on modern infantry small arms development, giving rise to an entire class of weapons borrowing the name assault rifle.

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.