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HK21 Story Quotes
Gun Information
Full name HK21
Country of origin West Germany
Manufacturer Heckler & Koch
Game Information
Faction Griffin & Kryuger
Manufactured /
Revised by
Voice actor Lynn
Artist 小吃
Released on CN, TW, KR, EN (HMG21), JP (HMG21)
Chibi Animation

Click the marked area to switch between animations. For details regarding animations, please see Animations on the Wiki.

How to obtain[edit]

NORMALHEAVY Not craftable.

DROP Possible drop in Operation Rabbit Hunt+ in E1-3 and E2-3 (CN/TW/KR)

REWARD Rewarded after clearing E2-D4 of Singularity

Exclusive Equipment[edit]

There is no exclusive equipment for this T-Doll.

Stats / Data[edit]

85(x1)169(x1) / 845(x5) 40(x1) / 140(x5) 30(x1) / 90(x5)
32 92
4 33
4 29
Rate of Fire
 Rate of Fire
90 135
Movement Speed
 Move Speed
Critical Hit Rate
 Crit. Rate
Critical Hit Damage
 Crit. Damage
Armor Penetration
 Armor Pen.
Clip Size
 Clip Size
Icon slot Accessory.png Icon Telescopic Sight S 2star.png Icon Holographic Sight S 2star.png
Icon Red Dot Sight S 2star.png Icon Night Combat Equipment S 2star.png
Icon Silencer S 2star.png
Icon slot Magazine.png Icon Armor-Piercing Ammo S 2star.png Icon HP Ammo S 2star.png
Icon Shotgun Ammo S 2star.png
Icon High-Velocity Ammo S 2star.png
Icon slot Doll.png Icon Microchip S 2star.png Icon Exoskeleton S 2star.png
Icon Ballistic Plate S 2star.png Icon Camo Cape S 2star.png
Icon Ammo Box S 2star.png

Affects shotguns
Increase damage by 15%
Increase armor by 15%

Weapon Background[edit]

A product derived from Heckler & Koch's G3 battle rifle, HK designed the 7.62 calibre machinegun HK21 in 1961.

This machinegun fires from a closed bolt, operates on the roller-delayed blowback action mechanism of G3. Chambered for 7.62x51mm NATO calibre, HK21 is able to fire at a rate of 800 rounds per minute cyclic, within a 1200 metres effective range coverage. The ambidextrous fire selector leaver allows HK21 to fire as semi-automatic on top of fully automatic firing, forearm of the weapon can mount a bipod for prone position/wall mounted firing.

The belt feeding module is located beneath the receiver, which means HK21 can be modified/reconfigured to accept either magazines or to feed from munition belts. HK21 can be fed with 20-/30-round box magazines, 80-round drum magazine or lose/boxed ammo belts in lengths of 50 increments, HK21 can also make use of G3's 7.62 magazines.

Close bolt firing meant the weapon have limited the maximum effective range and sustained firepower capabilities when compared to open bolt design MGs, however it does have a more accurate semi-automatic firing performance, to an extend they function relatively ideal as a squad automatic weapon. But HK21 did not enter full time service with the Bundeswehr, the main service MG contract during the Cold War for West Germany was taken by Rheinmetal's MG3.

With HK21 not being chosen as the main service MG, HK soon turn their development focus to export with the HK21 series of LMG, reconfigured, resized and rechambered variants such as HK11E, HK21E and HK23E were widely exported to many countries inside and outside of NATO. However the production of roller-delayed blowback MGs gradually slowed down with the trending interest in gas-operated MGs, HK ceased the production of HK21 lines of MG completely by early 2000, the new line of MG developed by HK would be the HK123 (MG4) family.[1][2]


A MG T-Doll introduced with the event Singularity. HK21 actually measures 160cm in body height, her hair style is medium length bleached blonde tighten in twin ponies, the colours are not her original but what she bleached herself afterwards. HK21 is identified by her cowboy style outfits, her grey tint round glasses and her pink iris.

Artist 小吃 made comments on HK21's design on a character sheet posted on Twitter that many HK21's character component, details and overall colour theme are inspired from AR G3Thumb button.pngG3 .[3]

The character sheet also included many items of interest HK21 has in her inventory:

  • The small key-ring of her sister which is typically found attached on HK21's barrel, symbolizing her affection to her sister.
  • The hair ornament piece that ties her twin ponytails also clearly resembles G3's antennas.
  • Other items such as round shaped glasses, cross necklace, scarf badge and belted 7.62 ammunition.


Main artwork

Gallery consisting of artworks used primarily in-game.

Alternative artwork

Alternate gallery consisting of artworks with slight alterations as well as miscellaneous artworks.