M7S SMG

"The suppressed M7 -- tears through armor and turns bad guys into chum."

- Gunnery Sergeant Edward Buck

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.

Design details
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. To assist the user in target acquisition, the weapon is fitted with a SLS/V 5B smart-linked scope. 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. Some usage of the M7S sees the SMG employed with a laser sight.

History
The M7S was introduced into UNSC service in 2431, 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. 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, and has since continued to see use by ODST units in the Post-Covenant War conflicts.

Changes from Halo 2 Vista to Halo 3: ODST

 * 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

 * 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.

Changes from Halo 2: Anniversary to Halo 3

 * Can no longer be dual wielded.

Trivia

 * 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.
 * The M7S was added to the Halo: The Master Chief Collection version of Halo 3 when Halo 3: ODST was added to PC.

List of appearances

 * Halo: First Strike
 * Halo 2 for Windows Vista
 * Halo 3
 * Halo: Contact Harvest
 * Halo: Helljumper
 * The Life
 * Halo 3: ODST
 * Halo Legends
 * The Babysitter
 * Halo: Evolutions - Essential Tales of the Halo Universe
 * Headhunters
 * Halo 2: Anniversary
 * Halo: New Blood
 * Hunt the Truth
 * Halo: Spartan Strike
 * Halo: The Fall of Reach - The Animated Series
 * Halo Wars 2
 * Halo: Retribution