In December 2009, a modified version of the HK416 was selected for the final testing in the Infantry Automatic Rifle program, designed to partially replace the M249 light machine gun at the squad level for the United States Marine Corps.
U prosincu 2009., modificirana verzija HK416 je odabrana za posljednje testiranje u programu za automatsku pješačku pušku (IAR), dizajnirana za zamjenu lake strojnice M249 kod jedinica američkog marinskog korpusa.