The Combat Shotgun is an effective short range weapon with a slow rate of fire featured in RAGE. The shotgun uses three types of ammunition. This weapon is obtained upon completing the quest "Radio Tower Repair".
The shotgun using buckshot can kill most mutants and unarmored enemies with 1-2 hits, and kill most armored enemies with 2–5 well placed shots. It is extremely effective when in close quarters, dealing massive damage to even the strongest enemies. If the enemies are armored, and the shot does not kill them, it has a high chance of stunning them for several seconds, making using the shotgun a very effective way of killing heavily armored enemies quickly and efficiently.
Unlike the Double Barrel Shotgun which fires two rounds per shot, the Combat Shotgun only fires one round per shot. Upon reloading the weapon the protagonist enters the shells manually, refilling two shells at a time.
- Buckshot: The standard spread-type ammunition type for the Combat Shotgun.
- Pop Rockets: Explosive grenade rounds that detonate on impact.
- Pulse Shot: EMP-charged shotgun slugs that deal more damage to armored and robotic enemies.
The only upgrade available for the Combat Shotgun is the Shotgun Extender. It adds a box magazine for faster reloading. It is available for purchase for $250 from Coffer's "Outfitters" in Wellspring and from "Jani's Supplies" in Subway Town later on.
- The Combat Shotgun is one of the most powerful and versatile weapons in the game and, coupled with the fact it is obtained relatively early in the story, it is usually one of the most frequently used weapons in the player's arsenal.
- The shotgun is clearly a semi-automatic model as the protagonist is never seen pumping the action. This is especially noticeable with the Extender upgrade.
- While using the iron sights, the player can see the Quake logo.
- The shotgun has a resemblance to the combat shotgun used in Quake 4, another game made by id Software. There is also the similarity that the two weapons gain the same upgrade. It is unknown whether these weapons look alike due to a reference of Quake or plain coincidence.