This light machine gun is very similar in stats to M60, but it loses in terms of stability a little bit. This means that your first few shots may miss the desired target. But as soon as you're firing on all cylinders, M249 B will get better and better.
This is a typical trait of heavy weapons that tend to stabilize the longer you shoot. But besides that it is a great alternative to M60 in case you can't find a better option in The Division 2.