 The EMR is primarily used by a designated marksman, to provide precision fire for units that do not rate a scout sniper.As a replacement for the DMR, the EMR fills the need for a lightweight, accurate weapon system utilizing a cartridge more powerful than the M16A4's standard 5.56×45mm NATO—the 7.62×51mm NATO.The EMR is also used by Marine scout snipers when the mission requires rapid accurate fire and by Marine Corps explosive ordnance disposal teams.