Auto Shotgun

The Benelli M4 Super 90 semi-automatic shotgun is a second-tier weapon and is a more powerful version of the pump shotgun that does not require a pump after each shot. It holds 10 shells at a time with 128 in reserve and, like the pump shotgun, can be fired without loading all the shells. This is the best short range weapon in the game. It can fire extremely fast and takes out massive amounts of infected in one shot. However, the comparatively low magazine and accuracy (versus the M16 or Uzi) make it slightly less effective against Hordes, the Tank or the Witch. It is generally a good idea to have at least one member of the team using a shotgun.

In reality, the M4 Super 90 fires in semi-automatic, not full auto as in game. The only two fully automatic shotguns to gain any popularity are the Pancor Jackhammmer and AA-12, neither of which are produced anymore nor are in game.