Based on the Italian SPAS-12, the combat shotgun uses a gas-operated repeater system much like any semi/fully automatic pistol or rifle. On a shell-by-shell basis, the firepower and range are only a bit greater than the regular shotgun. Given its semi-automatic functionality, however, the rate of fire is on par with that of the 9mm, meaning you'll be unloading much more ammunition on unsuspecting foes. Not only will rip through a group of enemies rather quickly, it also makes short work of cars and heli's as well. Sadly, you can't get two of these after reaching Hitman status, but then again, that might make the game entirely too easy. On the bright side though, you will be able to fire while moving and get an increased lock-on distance with some practice.