Origin
Germany
The 1972 Munich Olympics Massacre prompted for new law enforcement weaponry's development, one of the outcome was the HK P7 pistol type semi-automatic handgun. Designed for policing units under strict specifications in the field of weapon size, weight, minimum muzzle energy, service life time and capability of firing the 9x19mm Parabellum cartridge. P7 is designed to be fully ambidextrous, safe to carry while loaded, easily quickly drawn and fire instantly. Differs from other pistols with their recoil or simple blow-back operation, the operation of the P7 actually relies a gas delayed blow-back mechanism, advantages of this system are a simpler manufacturing process and a high mechanical accuracy (due to the barrel being fixed in the frame). P7 features a hexagonal rifling barrel to achieve a longer service life time, able to feed on a 8-round single stack magazine, aiming of the weapon relies on the built in iron sight. Other feature include an enlarged trigger guard for comfortable two handed firing and a unique built-in cocking lever located at the front of the grip which must be squeezed before the pistol can be fired, making the pistol safe to carry while loaded. P7 had many variants designed to fire other popular handgun cartridge such as .22 Long Rifle .40 S&W. P7 is widely exported to many other countries and used primarily by law enforcement units, special police and even counter terrorist units.

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.