Heckler & Koch MG5

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Heckler & Koch HK121
Type General-purpose machine gun
Place of origin Germany
Service history
Used by See users
Production history
Designed 2010
Manufacturer Heckler & Koch
Produced 2010 -
Variants See variants
Cartridge 7.62×51mm NATO
Caliber 7.62 mm
Action Gas-operated, rotating bolt
Rate of fire 640/720/800 rounds/min
Muzzle velocity MG 5 A1: 840 m/s
MG 5 & MG 5 S: 810 m/s
MG 5 A2: 785 m/s
Effective firing range 600 m (bipod)
Maximum firing range 1,200 - 1,500 m (gun mount)
Feed system 50-round belt in drum container or 120-round belt in separate box
Sights Diopter sight[1]

The MG5 formerly know as the HK121 is a general-purpose machine gun manufactured by Heckler & Koch. The weapon is intended as a replacement for the Rheinmetall MG3. The MG5 resembles the 5.56×45mm NATO Heckler & Koch MG4 light machine gun, which was adopted into German military service in 2005. In June 2013, it was announced that Germany was conducting testing and evaluation on 65 samples and planned to purchase at least 7,114 of the machine guns for the Bundeswehr during 2014-2017, in a deal that over time could grow to 12,733 HK121.[2]

Design details[edit]

The MG5 is a gas operated weapon chambered for the 7.62×51mm NATO round. The weapon operates almost similar compared to the MG4 light machine gun. The safety and 3 position fire rate selector levers are ambidextrous, the butt stock can be folded depending on the variant and numerous Picatinny rails allow the installation of optical sights and other accessories. The quick-change barrel has a heat shield and a carrying/barrel exchange handle. A hot barrel can be replaced without the need for protective gloves. The iron sights consists of a collapsible front sight and a height and windage adjustable rear diopter sight. The charging handle is located on the right side of the weapon. For feeding 50-round belted ammunition pochess or 120-round belted ammunition boxes can be mounted on the left side. The MG5 can be installed on all mounts and tripods originally developed for MG3 machine guns using additional adapters.


Variant Overall length[A 1]
Barrel length
Weight[A 2]
MG5 (Universal) 1160 (960) 550 239 120 11,20 (3,00)
MG5 A2 (Infantry) 1060[A 3] 460 285 9,90 (2,50)
MG5 A1 (Mounted) 1055[A 3] 663 195 10,00 (3,24)
MG5 S (Special Forces) 1012[A 3] 550 239 171 12,10 (3,00)
  1. ^ Overall length: Stock unfolded (Stock folded)
  2. ^ Weight: Weapon (Barrel)
  3. ^ a b c Fixed stock


  •  GermanyBundeswehr pre-production guns designated as MG5[3] 15. Fist batch of 1,215 MG5 ordered on 15 March 2015 for about €20 million.[4] The procurement process of 12,733 units, with a price tag of about €200 million has been delayed due to accuracy concerns[5]


  1. ^ Weisswange, Jan-Phillipp; u. a (April 2010). "Handwaffen, Kampfmittel und Ausrüstung für den infanteristischen Einsatz". Wehrtechnischer Report 4/2010 (in German) (Bonn und Sulzbach: Report Verlag). 
  2. ^ "...will der Bund von 2014 an bis zum Jahr 2017 mindestens 7114 Gewehre des Typs MG5 im Wert von 118 Millionen Euro kaufen. ... Später kann die Order laut Rahmenvertrag sogar auf bis zu 12.733 Maschinengewehre in einem Gesamtwert von rund 240 Millionen Euro anwachsen." Wiwo.de. Retrieved 2013-07-27.
  3. ^ Karin Zeger (2013-07-15). "Heckler & Koch: Großauftrag für Bundeswehr". Schwarzwälder Bote (in German). Retrieved 2013-07-20. 
  4. ^ H&K Troubles Continue: MG5 Under Scrutiny By German MoD - The Firearmsblog 2015-06-10
  5. ^ BREAKING: Delays Beset German MG5 Program, 7.62mm GPMG May Lack Accuracy - The Firearmsblog 2015-09-09

External links[edit]