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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 -
Weight 10.8 kg
Length 1165 mm
Barrel length 550 mm


Cartridge 7.62×51mm NATO
Caliber 7.62 mm
Action Gas-operated
Rate of fire 600-800rpm
Muzzle velocity Hk 121u & Hk121s-810m/s,Hk121l-785m/s,Hk121EBW-840m/s
Effective range 600m[bipod]
Maximum range 1200m[gun mount]
Feed system 50 round belt in drum container or 120 round belt in separate box
Sights Diopter sight

The HK121 is a 7.62×51mm NATO general-purpose machine gun manufactured by Heckler & Koch. The weapon is intended as a replacement for the Rheinmetall MG3.[2] This weapon 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 is conducting testing and evaluation on 65 samples and plan 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.[3]


  1. Weisswange, Jan-Phillipp; u. a (April 2010). "Handwaffen, Kampfmittel und Ausrüstung für den infanteristischen Einsatz" (in German). Bonn und Sulzbach: Report Verlag. 
  3. "...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." Retrieved 2013-07-27.

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