User blog comment:Zephalian/Battlefield DLC TBA/@comment-76.4.192.41-20120208002557/@comment-770363-20120208195336

Actually, the M39 EMR competed against the Mk 14 EBR for the Marines, but the Corps chose the M39. The M39 is semi-auto while the Mk 14 is selective fire, and the Mk 14 is shorter, lighter, and more flexible in it's role. The M39 is just more specialized for the marksman role than the EBR. It's like the difference between an F-15C and an F-15E.