The Sawed-Off Shotgun is the stubby, double-barreled cousin of the sleeker Gnasher Shotgun–with five times the damage. It fires a narrow spread of pellets and it's a devastating weapon at medium to close range. In one shot it can kill multiple enemies or even bring down a Boomer or Mauler. However, it's very slow to reload and only useful in close combat.
It first appeared in Gears of War 3.