Combat Shotgun (Fallout)/Fallout4

Information
The default combat shotgun utilizes an 8 round box magazine, but can be upgraded with a 12 round extended magazine or a 32 round drum magazine. The weapon is semi-automatic, and being magazine fed it does well in clearing out rooms and ripping apart enemies at close range. As indicated by the metal stamping on the weapon's bolt, the combat shotgun is chambered for 12 gauge shotgun shells. Each shell holds 7 (shot) pellets by default.

The combat shotgun can, however, be upgraded to be a fully automatic weapon at the expense of reduced range (in contrast to other weapons where fully automatic modification mainly reduces damage per shot and only has a small effect on range). But the automatic receiver fires barely faster than (manually) rapid firing the semi-automatic version. In fact the Hair Trigger and Advanced semi-auto receivers fire faster than the various automatic receivers, apart from the Rapid Automatic receiver.

Like double barreled shotguns, combat shotguns suffer very severe damage penalties when fired outside of the listed range. The range-based damage penalties are 5x greater than for other types of weapon. This is in addition to the consequences of pellet spread at range, which will cause more pellets to miss as the range increases.

The weapon features rather heavy recoil; even when fully optimized with modifications for recoil control it still remains considerable, which can limit the weapon's ability to accurately make rapid follow up shots anywhere outside of point blank range.

On the plus side, when hipfiring outside of V.A.T.S., unlike other weapons, shotguns suffer no penalty to the aiming reticle size when moving the weapon laterally. This is similar to the effect of finned barrels on pipe guns.

The combat shotgun and combat rifle share nearly identical models, with only a few differences. This may make it confusing when clearing out a room of raiders or gunners with combat rifles and shotguns.

The two-shot variant fires 7x2=14 projectiles, instead of 7+1=8 projectiles. Adding the advanced receiver adds an extra projectile per shot. When equipped with a drum magazine, full stock, front sight ring, long barrel, and compensator, this weapon closely resembles the Combat shotgun seen in Fallout 3. The only major difference is the placement of the magazine, which in Fallout 3 was placed in front of the ejection port.

Mods

 * Standard Receiver
 * Light Frame Receiver
 * Heavy Frame Receiver
 * Calibrated Receiver
 * Hardened Receiver
 * Automatic Receiver
 * Armor Piercing Automatic Receiver
 * Hair Trigger Receiver
 * Powerful Receiver
 * Hardened Automatic Receiver
 * Rapid Automatic Receiver
 * Calibrated Powerful Receiver
 * Hardened Piercing Auto Receiver
 * Advanced Receiver
 * Powerful Automatic Receiver
 * Short Barrel
 * Long Barrel
 * Short Ported and Shielded Barrel
 * Long Ported and Shielded Barrel
 * Short Stock
 * Full Stock
 * Marksman's Stock
 * Recoil Compensating Stock
 * Standard Magazine
 * Medium Magazine
 * Drum Magazine
 * Quick Eject Mag
 * Medium Quick Eject Mag
 * Quick Eject Drum Mag
 * Standard Sights
 * Front Sight Ring
 * Glow Front Sight Ring
 * Glow Sight
 * Short Scope
 * Reflex Sight
 * Medium Scope
 * Long Scope
 * Short Night Vision Scope
 * Medium Night Vision Scope
 * Long Night Vision Scope
 * Short Recon Scope
 * Long Recon Scope
 * Large Bayonet
 * Compensator
 * Muzzle Break
 * Suppressor

Justice
The weapon bears the Staggering effect, which has a chance to stagger on hit.

By default, the weapon comes equipped with the following: Sold only by Penny in Covenant. Should she die for any reason, the weapon becomes unavailable.
 * Powerful receiver
 * Short barrel
 * Marksman's stock
 * Standard magazine
 * Standard sights
 * Compensator

Le Fusil Terribles
A unique combat shotgun bearing the Violent effect, which deals +25% damage/limb damage but also significantly increases recoil.

By default, the weapon comes with the following:

This unique-named legendary weapon is found within the massive floating raider encampment, Libertalia. It is located at the top of a lootable wooden crate within the captain's cabin at the top of the compound. The crate is located immediately across the room from the door, beside a burning lantern.
 * Light frame receiver
 * Long ported and shielded barrel
 * Full stock
 * Drum magazine
 * Front sight ring
 * No muzzle

While the French is not perfectly translated (translating more directly to "The Terrible Gun", with "terribles" unnecessarily pluralized), the name, along with the gun's role as a unique combat shotgun with higher damage but higher recoil, all make it a likely reference to The Terrible Shotgun from Fallout 3. The name of the weapon is likely a reference to the french novel and movie Les Enfants Terribles.