From Halopedia, the Halo wiki

H2A M7S-SMG.png
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:

2431 - present[2]

"The suppressed M7 -- tears through armor and turns bad guys into chum."
Gunnery Sergeant Edward Buck[3]

The M7S Submachine Gun, sometimes referred to as the Suppressed or Silenced SMG or more colloquially by UNSC personnel as the bullet hose, black box, chum and popcorn, 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 an underbarrel 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] Some usage of the M7S sees the SMG employed with a laser sight.[4]


The M7S was introduced into UNSC service in 2431[2], and saw use during the Insurrection. The M7S was notably employed by SPARTAN-II Blue Team during Operation: TALON, during which they captured URF leader Robert Watts.[5] The weapon continued to see use throughout the Human-Covenant War, becoming notably iconic in the hands of Orbital Drop Shock Troopers. The weapon saw heavy use during the Battle of Mombasa in late 2552[6], and has since continued to see use by ODST units in the Post-Covenant War conflicts.[7][4]


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 to utilize the guns' scope while dual wielding.
  • The weapon now has visible reticle bloom in place of spread.

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

  • Can no longer be dual wielded.
  • Visible reticle bloom is replaced by spread.

Production notes[edit]

The M7S is one of several weapons cut during the production of Halo 2. In this iteration, the M7S was simply the regular M7 SMG with a sound suppressor attached, alongside updated particles and sound effects. The weapon was later introduced in the Halo 2 PC port as a default spawn on the Example map, and for use in modding. The weapon is also found by default on the cut map Beach Battle, similarly-intended for use as a modding tutorial.

The weapon was first canonically mentioned in the article for the M7 SMG in Halo 3,[8] referencing the Halo 2 M7S, before properly being introduced as a staple weapon of Halo 3: ODST, and in the updated multiplayer component of Halo 2: Anniversary.

In Halo: The Master Chief Collection, the release of Halo 2 on PC saw the M7S added to the game's shared file directory, allowing anyone to use it via modding. The release of Halo 3: ODST on PC later saw the M7S ported into Halo 3, available for use in multiplayer and Forge.


  • 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".
  • In Halo Wars 2, the M7S SMGs wielded by ODSTs are equipped with laser sights.


List of appearances[edit]