A shotgun, also called a "scattergun", is a firearm designed to shoot a multitude of projectiles with a single pull of the trigger. This makes it very effective at hunting game, greatly increasing the weapon's hit potential. However, the accuracy and power found at close range diminish rapidly as you get farther away from the target. Shotguns designed for military use are often called "combat shotguns".
Someone took the time to chop the last few inches off the barrel and stock of this shotgun. Now, the wide spread of this hand-cannon's short-barreled shots make it perfect for short-range crowd control.
The Kneecapper deals much more damage than any of the non-unique shotguns, and is significantly more accurate than the regular sawed-off. A combat shotgun would be more accurate and more reliable, considering the difference of 10 whole shells in the capacity of both weapons, but The Kneecapper deals more damage. This gun relies on raw power since it does not hit any critical hit damage.
The Kneecapper can fire a total of 111 shots before breaking.