"Simple and effective pump-action shotgun; classic pump-action allows extremely powerful shells to be fired quickly."
―Overview of the M37A2 Pump Shotgun (from Aliens: Colonial Marines)

The M37A2 Pump Shotgun, also known as the M37A2 Combat Shotgun, the 37A2, or the '37 was a pump action combat shotgun manufactured by Armat Battlefield Systems and used by the United States Colonial Marine Corps, the Colonial Marshals,[3] and Weyland-Yutani PMCs.


Derived from the classic Ithaca 37 "Stakeout", the M37A2 shared its qualities of reliability and firepower with that model. However, compared to its predecessor, it offered more opportunities for customization. A B3 Barrel Choke Tube could be added to narrow the pellet spread when firing, while the standard M37A2 Stock Iron Sight could be replaced with a S7 Alloy Iron Sight. Adding a Laser Targeting System increased accuracy, and reloading could be made easier with a C8 Custom Loading Port.[1]

Notable Users[]

The M37A2 is the standard secondary weapon of Colonial Marines. Some Weyland-Yutani PMC are also equipped with some of them.[1] Colonial Marshalls are also known to use them.[3]

In 2179, Lisbeth Hutchins aboard the USS Legato armed herself with a M37A2 Pump Shotgun along with a M39 Submachine Gun and a M240 Incinerator Unit after subduing two PMCs with Facehuggers. Samwell Stone and Hicks probably snatched M37A2 from the PMCs before finding better weapons in the Sulaco armory. Rick Levy after freeing Hicks from captivity made use of a M37A2 Combat Shotgun against Weyland-Yutani PMCs onboard the Resolute and might lose it after being catpured on LV-426.[4]

Later on, during the conflict between the Colonial Marines of the USS Sephora and Weyland-Yutani PMCs, aboard the USS Sulaco and the Origin Facility on Acheron, Keyes from Rhino 2-3 used one as his main weapon before being killed, Cpl. Christopher Winters can also have one as secondary weapon.[1]


The M37A2 can fire a wide range of ammunitions:

12-gauge Buckshot Shell: Filled with standard buckshot pellets, deadly at close range.[1]

S11 Expanding Shot Shell: Shell filled with mushroom shaped anti-personal shot, should it hit an organic target the shots expand causing tremendous damages.[1]

R1 Flechette Round Shell: Shell filled wih pointed arrow-like shaped steel darts designed to ensure minimal spread.[1]

B15 Timed Explosive Shell: Shell filled with a high-explosive B15 fragmentation projectile, when fired the timed fused is activated exploding shortly after.[1]


  • The M37A2 is unlocked by default, as with the M41A Pulse Rifle MK2, M4A3 Service Pistol and M40 HEDP Grenade, this is barring DLC unlocked weapons.
  • The M37A2 is based on the cut down Ithaca Model 37 hunting variant carried Corporal Hicks in Aliens, which also appears in Aliens: Colonial Marines as the Legendary Weapon Hicks' Shotgun. In fact, the model for Hicks' Shotgun appears to be a modified version of the M37A2's, or vice versa. The M37A2's designation also appears to be based on the Ithaca, "M37" being an acronym for "Model 37" (as in real life) and "A2" suggesting that is an improved version of the Ithaca. However, despite being based on the same weapon, Hicks' Shotgun and the M37A2 do not share ammunition and have different round capacities (even though their models both have the same length magazine tubes).
  • Unlike most of the standard weapons of in Aliens: Colonial Marines, the M37A2 was not developed specifically for the game; it first appeared in the 2011 video game Aliens: Infestation (which is loosely based on Aliens: Colonial Marines) as the "M37A2 Combat Shotgun".
  • The Alien: The Roleplaying Game's depiction of the M37A2 is not based on the cut down Model 37. Rather, the weapon's appearance is based Model 37-12 Gauge Pump Action (and by extension, the SWATriplex-18 shotgun) from Alien: Isolation, with the only exception of its manufacturer and designation (Armat Model 37A2 12 Gauge Pump Action).
  • The M37A2 seems to be based on the Ithaca 37 "Stakeout", but its tubular magazine is too short to hold 8 rounds. Besides no Ithaca models can hold 8 rounds in a tube as it comes only with a standard 4-round tube or an extended 7-round tube. The only way to have 8 round is to have a full 7-round tube with a shell chambered so this one could only hold 4 shells or 5 with a chambered one.