M200

The M200 is a pure long range weapon, capable of one-shotting players from afar like in City or Park, though, some times it will be a two shot kill if the player is far enough.

Personally though, I would not recommend the M200, as the fire rate of the M40A5 is high enough to have a quick follow up shot on the target, and is also a one-shot in maps like Outpost or Urban, as well as some parts of City.