Pump shotgun

The pump shotgun is a short range, high damage weapon known for its huge stopping power, capable of stunning any but the largest creatures. With a decent firerate and good accuracy, its other alternative is the chain shotgun.

Acquisition

Pump shotguns can be crafted at a machining table once the Gunsmithing research has been completed; from 60 Steel, 3 Componentss and 12,000 ticks (3.33 mins) of work. A crafting skill of at least 5 is required.

Pump shotguns can also be purchased from outlander and orbital combat suppliers, outlander settlements, or obtained from the following raider kinds:

Raider Kind	Chance	Average Quality	Health
Scavenger Gunner	11.65%	Normal	40-110%
Pirate Gunner	22.62%	Normal	70-230%
Town Guard	18.90%	Normal	60-200%
Mercenary Gunner	12.13%	Normal	70-320%
Ancient Soldier	9.50%	Normal	100%

Summary

The pump shotgun is a powerful weapon, with good per-shot damage, excellent accuracy (technically beating the bolt-action rifle) and decent fire rate. Excluding explosives, the pump shotgun has the highest damage output of all single-shot weapons in the game. The pump shotgun (and chain shotgun) also have the highest stopping power of conventional weapons, able to stagger every pawn kind barring elephants, thrumbos and megasloths.

But as expected from a shotgun, its range is lacking. Even hand-thrown pila out-range a pump shotgun, let alone low-tier firearms such as the revolver. Pump shotguns only outrange chain shotguns and explosives. This makes the shotgun a poor hunting weapon, since quarry is more likely to turn manhunter.

Overall damage output falls behind cheaper burst-firing weapons such as the machine pistol, though the pump shotgun does regain ground and even claim a slight advantage towards its maximum range. But as it fires a single shot, pump shotguns are more likely to destroy/severely damage limbs and organs. Armor penetration is also quite poor, being in a similar league to the autopistol and greatbow.

Against an unarmored human, a pump shotgun can kill with 3 hits to the torso, 2 hits to the head or neck, or 1 hit to the brain; cripple or destroy limbs in 2 hits; and destroy eyes and digits with a single hit. It'll generally take around 4 hits (~10.3 seconds average) to incapacitate that human from pain shock.

Overall, the pump shotgun is best paired with a careful shooter up to level 6, then with a trigger-happy shooter beyond that point.

Analysis

All-in-all, the pump shotgun is best suited as a close-quarters offensive weapon, but can also act as a supporting weapon for close-quarters encounters such as infestations due to its rate of fire and stopping power. However, remember that pawns can't fire guns in melee, even if its a shotgun. Keep a shotgun (pump or chain) in your rec room for those days when mechs drop in right on top of you.

The chain shotgun is generally considered an upgrade. It fire a 3 shot burst, with each shot equal to that of a chain shotgun, but with a longer warmup/cooldown. This makes the chain shotgun have noticably higher DPS than the pump - 11.18 v. 6.97 with average accuracy. The chain shotgun is less accurate, but stray shots may hit other targets, making it even better against multiple pawns. However, it requires the more advanced Gas Operation research, won't spawn on early raids, and has a 3-tile smaller range.

Attack table

Ranged

Pump shotgun			Accuracy (Touch)	Accuracy (Short)	Accuracy (Medium)	Accuracy (Long)	DPS (Optimal)	DPS (Touch)	DPS (Short)	DPS (Medium)	DPS (Long)	Market value
Quality	Dam.	AP	Accuracy (Touch)	Accuracy (Short)	Accuracy (Medium)	Accuracy (Long)	DPS (Optimal)	DPS (Touch)	DPS (Short)	DPS (Medium)	DPS (Long)	Market value
Awful	16.2	12.6%	64%	69.6%	61.6%	51.2%	7.53	4.82	5.27	4.67	-	128
Poor	18	14%	72%	78.3%	69.3%	57.6%	8.37	6.03	6.53	5.78	-	191
Normal	18	14%	80%	87%	77%	64%	8.37	6.7	7.28	6.44	-	255
Good	18	14%	88%	95.7%	84.7%	70.4%	8.37	7.37	8.04	7.11	-	320
Excellent	18	14%	96%	100%	92.4%	76.8%	8.37	8.04	8.37	7.7	-	380
Masterwork	22.5	17.5%	100%	100%	100%	86.4%	10.46	10.46	10.46	10.46	-	635
Legendary	27	21%	100%	100%	100%	96%	12.56	12.56	12.56	12.56	-	1275

^{For the full effects of qualities, see Quality. Values shown in Red indicate the weapon is out of range at the reference point for this range band.
The value is provided due to the interpolated nature of accuracy between range points.}

Melee

Feature	Toggle
Attacks

Pump shotgun			Stock (Blunt)					Barrel (Blunt)					Barrel (Poke)					Human: Left & right fist (Blunt)					HP	Value
Quality	DPS^[1]	AP^[1]	Dam.	Cool.	AP	DPS	Chance^[2]	Dam.	Cool.	AP	DPS	Chance^[2]	Dam.	Cool.	AP	DPS	Chance^[2]	Dam.	Cool.	AP	DPS	Chance^[2]	HP	Value
Awful	3.98	11.6%	7.2	2s	10.4%	3.6	8.33%	7.2	2s	10.4%	3.6	8.33%	7.2	2s	10.4%	3.6	8.33%	8.2	2s	12%	4.1	2× 37.5%	100	128
Poor	4.07	11.82%	8.1	2s	11.7%	4.05	20%	8.1	2s	11.7%	4.05	20%	8.1	2s	11.7%	4.05	20%	8.2	2s	12%	4.1	2× 20%	100	191
Normal	4.4	12.75%	9	2s	13%	4.5	25%	9	2s	13%	4.5	25%	9	2s	13%	4.5	25%	8.2	2s	12%	4.1	2× 12.5%	100	255
Good	4.74	13.73%	9.9	2s	14.3%	4.95	25%	9.9	2s	14.3%	4.95	25%	9.9	2s	14.3%	4.95	25%	8.2	2s	12%	4.1	2× 12.5%	100	320
Excellent	5.08	14.7%	10.8	2s	15.6%	5.4	25%	10.8	2s	15.6%	5.4	25%	10.8	2s	15.6%	5.4	25%	8.2	2s	12%	4.1	2× 12.5%	100	380
Masterwork	5.92	17.14%	13.05	2s	18.85%	6.53	25%	13.05	2s	18.85%	6.53	25%	13.05	2s	18.85%	6.53	25%	8.2	2s	12%	4.1	2× 12.5%	100	635
Legendary	6.59	19.09%	14.85	2s	21.45%	7.43	25%	14.85	2s	21.45%	7.43	25%	14.85	2s	21.45%	7.43	25%	8.2	2s	12%	4.1	2× 12.5%	100	1275

^{For the full effects of qualities, see Quality.}

↑ ^1.0 ^1.1 Note: This is the actual base average derived from the melee verb system updated in 1.1.2610, it may sometimes disagree with the listed value in the in-game infobox.
It may also change depending on the stats and the melee verbs available to the wielder if the weapon is wielded by some other than a baseline human.
↑ Chance for attack to be selected, assuming the weapon is wielded by a baseline human. It may change depending on the melee verbs available to the wielder

Pump Shotgun vs. Comparable Weapons

This section goes over how well the pump shotgun fares against comparable weapons (similar value, tech level or similar characteristics) in 1 vs. 1 combat.

Methodology

All testing is semi-automated which allows for large sample sizes to be gathered per set of results with ease
All pawns have skill levels of 14 in ranged and melee
No pawns have any traits that affect combat performance
All pawns are of at least 18 years of age and completely healthy
Pawns are divided by walls to prevent stray shots from skewing results in any way
Weather is always kept clear
No cover is used for either team

Results in the tables below are the percentages of battles that pump shotguns either won or tied against the weapon listed in the first column of said tables, with a sample size of 2,000 battles per result. Higher percentages are better.

Unarmored

For the unarmored testing, all pawns wore normal quality plainleather pants, plainleather button-down shirts, plainleather dusters and plainleather cowboy hats.

Other Weapon	3	7	12	18	25	32	40
Chain Shotgun	26.25%	27.06%	28.20%	-	-	-	-
Revolver	61.01%	62.96%	66.75%	-	-	-	-
Autopistol	51.34%	54.84%	63.22%	-	-	-	-
Machine Pistol	23.56%	33.66%	48.88%	-	-	-	-
Pila	92.90%	92.95%	90.78%	-	-	-	-

Armored

For the armored testing, all pawns wore normal quality flak pants, flak vests, plainleather button-down shirts, flak jackets and steel simple helmets.

Other Weapon	3	7	12	18	25	32	40
Chain Shotgun	25.89%	26.14%	23.16%	-	-	-	-
Revolver	57.57%	60.52%	66.60%	-	-	-	-
Autopistol	48.56%	53.06%	61.86%	-	-	-	-
Machine Pistol	22.63%	30.87%	48.24%	-	-	-	-
Pila	97.60%	97.05%	96.41%	-	-	-	-

Graphs

The graphs assume a normal quality pump shotgun against an adult human that's out in the open in clear weather. For DPS, projectile speed has also been factored into the equation, with the weighting based on the base amount of attacks that it'll take to put the aforementioned target into pain shock.