S&T Daewoo K11 Dual-barrel Air-burst Weapon
from Girls' Frontline
Origin
Korea
K11 is the designation for a multi-weapon in service with the Armed Forces of Republic of Korea, the concept is very similar to the US XM29 Objective Individual Combat Weapon project, combining a 5.56x45mm calibre rifle and an air-burst launcher into a singular unit. Designed in between 2000 to 2008 by various companies, manufactured by S&T Motiv, the rifle itself undergone an overhaul in 2017, improved physical weight and grenade performance. The weapon consist of two parts, the bottom module is a 5.56mm calibre assault rifle, the top module is a bullpup configured 20x30mm calibre grenade launcher chambered for both air-burst "smart" grenades and conventional grenades. The grenade launcher module uses the rifle's trigger group to fire, it is unlikely it can function as a stand-alone weapon, while the rifle itself can potentially operate on its own. Fully assembled weapon measures 860mm in length and weights 6.1kg empty.

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.