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Production overview


Misriah Armory[1]

Model series:



Caseless Submachine Gun


1484 cR[1]



  • Extended: 62.7 centimetres (24.7 in)[1]
  • Retracted: 47.4 centimetres (18.7 in)[1]


Loaded: 1.3 kg (2.86 lbs)[1]

Ammunition type:

5×23mm M443 Caseless Full Metal Jacket/.197 Caliber rounds[1]

Feed system:

48-round magazine
60-round magazine


Gas-operating, rotating breech

Rate of fire:

900 rounds/min[1]

Effective range:

50 metres (160 ft)[1]

Service history

In service:

Human-Covenant War

"The suppressed M7 -- tears through armor and turns bad guys into chum."
Gunnery Sergeant Edward Buck[2]

The M7S Submachine Gun, sometimes referred to as the Suppressed or Silenced SMG, is a personal defense weapon issued to UNSC Armed Forces special operators.[1]

Design details[edit]

A variant of the M7 SMG, the M7S is equipped with an external flash and SS/M 49 sound suppressor on the barrel along with a flashlight.[1] To assist the user in target acquisition, the weapon is fitted with a SLS/V 5B smart-linked scope.[1] Muzzle flash is significantly reduced, and firing the weapon gives a barely noticeable sound, increasing stealth applications for the M7S Submachine Gun and increasing accuracy from decreased recoil, making the weapon more efficient at medium-long range. It fires 5×23mm M443 Caseless Full Metal Jacket from a reduced 48-round magazine.[1]


Changes from Halo 2 Vista to Halo 3: ODST[edit]

  • The weapon lacks an activated laser sight, which is now mitigated to a simple aesthetic on the weapon.
  • The M7S now has a 2× zoom scope, adding more ranged capabilities.

Changes from Halo 3: ODST to Halo 2: Anniversary[edit]

  • The magazine size is increased from 48 to 60 and ammo capacity also increased from 192 to 240.
  • The M7S can now be dual wielded, however the player will be unable utilize the guns' scope while dual wielding.
  • The M7S is equipped with a reflex sight that uses a miniature reticule, making it more effective in dark areas and general close quarters combat.


  • The M7S made its first in-game debut in the Example multiplayer map, featured in Halo 2 for Windows Vista.
  • The M7S is the starting weapon in most Firefight levels in Halo 3: ODST except for Windward, where the player starts with a sniper rifle instead.
  • The Halo 3: ODST manual erroneously states that the M7S is "a sound-suppressed variant of the M7 rifle".
  • The M7S is the first fully-automatic weapon in the Halo series to have a usable scope.
  • In Halo Wars 2, the M7S SMGs wielded by ODSTs are equipped with laser sights.


List of appearances[edit]