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|faction= [[Squad 404]]

{{artist name|STAR影法师}} (Primrose-Flavored Foil Candy);<br/>{{artist name|--}} (Percussion Bolero);<br/>{{artist name|umo}} (White Negroni)

During The Heckler & Koch HK416 is a collaboration project between the US Army Delta Force R&D department and the German firearm firearms company Heckler & Koch, at the request of US Army combat veteran Larry Vickers. The goal was to make a European M4 variant of that has a shorter profile and lacks the AR-15 platform was born's direct impingement system. The new carbine project rifle was originally named the HKM4, but was later on changed to HK416 after a law suit was filed by Colt Defense over the trademark for the M4 name. The project took inspiration from the HK50, XM8, and L85A2 endeavours of H&K.

Primarily chambered Chambered in the 5.56x45mm NATO cartridge, the HK416 is a short-stroke gas piston operated, rotating bolt, selective fire automatic carbine. Feeding from standard issue NATO STANAG magazines, the HK416 is able achieve rifle has a rate of fire of 700-900 rounds per minute. The rifle's default foldable iron sights provide accurate fire out to 300 meters. It features a proprietary short-stroke piston mechanism developed by H&K for the G36 as opposed to the direct gas impingement system used by most AR-15 derivatives. This piston system enhances the rifle's reliability once it is dipped in water or sand. It has an adjustable telescopic buttstock.

The HK416 rifle features Picatinny rail placements along the top of the upper receiver, as well as on the top, bottom, and sides of the RIS handguard. It is The rails are compatible with all forms of NATO standard combat various accessoriessuch as optical sights, lasers, which fit onto the rails of the rifle to allow it to adapt to a wide variety of tasksand flashlights. The RIS handguard does not come in contact with the barrel, which is "free-floating" to improve the rifle's accuracy by reducing the impact of the handguard's movements on the barrel. The bottom rails can mount a large number of attachments, including a fore-grip or a 40mm grenade launcher (usually typically the AG36/or M320 stylelaunchers), while the side rails are typically occupied by tactical lights/lasers and/or other combat accessories. The weapon also features a folding front iron sight, paired with a rear sight similar to that of a G3. The operator can make use of them should they not wish to mount optics.

The Military/Police units all over the world are adopting HK416 may be visually similar variants due to an AR-15 rifletheir reliability, but it features several technological innovations courtesy of H&K. Their HK50, XM8performance, and L85A2 projects served to provide valuable experience in the development of the HK416modularity. The HK416 sets itself apart from other AR-15 derivatives in that it uses Starting with the proprietary short-stroke piston mechanism developed by H&K for Norwegian army (HK416N), the G36 United States special operation groups such as opposed to a true direct gas impingement system. Other minor features include the newly-designed adjustable telescopic buttstock Delta Force and DEVGRU SEALs have followed suit and pistol grip to improve begun the overall ergonomics process of phasing out their M4A1 carbines for HK416s. The French army is also planning on replacing their FAMAS F1 with the weaponHK416F.<ref name = "416 wiki">[[wikipedia:Heckler & Koch HK416|Wikipedia entry on HK416]]</ref>.

Military/policing units all over the world are adopting the HK416 and its variants into their arsenal due to its undeniable reliability, performance, and modularity. Starting with the Norwegian army (HK416N), the United States special operation groups such as Delta Force and DEVGRU SEALs have also followed suit and have begun the process of phasing out their inventories of M4A1 carbines. The French army is also planning on gradually replacing their FAMAS F1 with the HK416F.<ref name = "416 wiki">[[wikipedia:Heckler & Koch HK416|Wikipedia entry on HK416]]</ref> For various reasons, the HK416 (likely due to the tremendous cost of replacing a service rifle) has yet to replace the G36/HK50 as the main service rifle of the German Germany's Bundeswehr. However, the Bundeswehr has they have purchased some HK416A5 rifles and which were given the designation of G38 to replace the MP5 as standard emergency firearm for them, likely for the use of their elite police units.,<ref name = "416 firearmblog">[https://www.thefirearmblog.com/blog/2014/09/01/hk416a5-now-g38/ The Firearm Blog article on HK416/G38]</ref><ref>[https://www.thefirearmblog.com/blog/2019/05/14/hessian-police-select-hk416/ The Firearm Blog article on German police adoption of the G38]</ref> while the HK416A7 was adopted by the German Special Commando Forces and the German Naval Special Commando Forces under the name G95 in 2017.<ref>[https://www.thefirearmblog.com/blog/2017/10/12/hk416-a7-called-g95-german-special-forces/ The Firearm Blog article on HK416/G95]</ref> The US Marine Corps' M27 Infantry Automatic Rifle is a beefed up version of the HK416, designed to partially replace the M249 Squad Automatic Weapon light machine gun in a suppressive fire role. The M27 IAR emphasizes a more marksman approach over the belt-fed M249 SAW, and is more maneuverable in CQB scenarios. It is fitted with a bipod for stability.<ref name = "M27 IAR">[[wikipedia:M27 Infantry Automatic Rifle|Wikipedia entry on M27 IAR]]</ref>

Artist NIXOO commented on the design of HK416 in the Official ''Girls' Frontline'' Art Book<ref name = "artbook">{{cite |ab1|202}}</ref>:

File:HK416_costume1.png|"Starry Cocoon" full artworkFile:HK416_costume1_D.png|"Starry Cocoon" full damaged artworkFile:HK416_costume2.png|"Black Cat's Gift" full artworkFile:HK416_costume2_D.png|"Black Cat's Gift" full damaged artworkFile:HK416_costume4.png|"Primrose-Flavored Foil Candy" full artworkFile:HK416_costume4_D.png|"Primrose-Flavored Foil Candy" full damaged artworkFile:HK416_costume5.png|"Fangs " full artworkFile:HK416_costume5_D.png|"Fangs" full damaged artworkFile:HK416_costume6.png|"Percussion Bolero" full artworkFile:HK416_costume6_D.png|"Percussion Bolero" full damaged artworkFile:HK416_costume7.png|"Midnight Evangelion" full artworkFile:HK416_costume7_D.png|"Midnight Evangelion" full damaged artworkFile:HK416_costume8.png|"White Negroni" full artworkFile:HK416_costume8_D.png|"White Negroni" full damaged artwork