12 Gauge Slug

Bad Company 2
In Battlefield: Bad Company 2, is a selectable specialization for any kit outfitted with a shotgun. When selected, a shotgun will fire a single, accurate, powerful, shot rather than the spread of pellets when using the standard buckshot. The damage of the slug is less than the combined damage of all the buckshot pellets, however the accuracy of the slug more than makes up for it, especcially since it is unlikely you will hit your target with every pellet. Combined with Magnum Ammo, it can make the game's pump shotguns a one-shot kill from about 100 feet away and a two-shot kill or one-shot headshot from afar. This, and the fact that the slug uses the sniper bullet model, essentially makes the pump action a powerful, fast-firing, unscoped sniper rifle.

Trivia
The slug shot uses the bullet model used for sniper bullets, and is affected by the game's fake gravity. The drop is inaccuarate though, since a slug would weigh more than a sniper bullet and would travel slower and drop considerably faster.