* Indonesia: Detasemen Jala Mengkara (Denjaka) is equipped with the HK416.[7]
* Netherlands: The Netherlands Army special forces unit Korps Commandotroepen selected the HK416 over other tested assault rifles to replace their Diemaco C8 carbines. The weapon is featured on several photos from the unit's recruitment day.[8] The HK416 is currently (2008) the standard assault rifle of the unit.
* Norway: On April 11, 2007, the Norwegian Ministry of Defence signed a contract for an initial order of 8,200 rifles to serve as the new standard service rifle for the armed forces.[9] The HK416 will replace the AG-3 that has been in use since 1967. The new rifle is slightly modified, with a different stock and pistol grip.[10] The deal also included the purchase of 6,500 MP7 submachine guns. Delivery began in March 2008. The first weapons are scheduled to reach soldiers by the end of 2008. Officers have already become familiar with the weapon and will soon be ready to instruct their soldiers. Groups that recruit people to INTOPS (International Operations) will receive priority, that includes the Norwegian Army 2nd Battalion, Telemark Battalion, Combat Service Support Battalion, Norwegian Army Engineer Battalion and the Norwegian Army Armoured Battalion. The 2nd Battalion, Engineer Battalion and Combat Service Support Battalion has already received the rifle and training.
* Poland: Adopted in small numbers as the primary weapon of GROM. Purchased both D10RS and D14.5RS variants that will replace current M4A1 clones made by Bushmaster and Knight's Armament Company.[11]
* Turkey: Turkish Army The Turkish Army has developed a Turkish version of the HK416 in co-operation with Heckler & Koch, Germany, named the Mehmetçik-1 [1]. MKE of Turkey has also currently produced over 9000 Mehmetçik-1 for testing and evaluation purposes and it is envisaged that the Turkish Army will replace all of its G3 rifles with the Mehmetçik-1 by 2010. This equates to a requirement of 500,000 Mehmetçik-1.
* United States: It is used by the U.S. Army's direct action group Delta Force (1st Special Forces Operational Detachment-Delta),[12] various other United States Special Operations Command (USSOCOM) units including DEVGRU, and formerly, the US Army's Asymmetric Warfare Group. The latter has since had to turn in their HK416.[13]. It is also in use with various elite law enforcement units, including United States Capitol Police SWAT.