Assault Rifle
Weapon Stats
Requirements Strength - 2
Standard Weapons - 6
Ammunition Standard Bullets
Armor-Piecing Bullets
Anti-Personnel Bullets
Magazine Size 36
Attack Type Single Shot
Damage 10
Summon Code "assault rifle"

When the rail launcher rounds were spent, when the auto-mines were bypassed, when the neuron acceleration field was neutralized, the men still had their M-22's and their gunpowder. And, by God, they used them to good effect.

The M-22 Assault Rifle is a weapon that appears in System Shock 2. It is the most powerful Standard Weapon in the game.


The Assault Rifle requires Standard Weapons skill level 6 and Strength 2 to use. No research is required.

Ammunition Types

StandardBullet Standard Bullets - The most common type of bullets in the game which deals Standard damage.
ArmorPiercing Armor-Piercing Bullets - Deals additional damage to partly and fully Mechanical opponents.
AntiPersonnel Anti-Personnel Bullets - Deals additional damage to partly and fully Annelid opponents.

Damage Table

Ammo Type Annelid Half-Annelid Mech Half-Mech Basic Final Boss
Standard x1 x1 x1 x1 x1 x1
Armor-Piecing x0.5 x0.5 x4 x2 x1 x1.25
Anti-Personnel x2 x4 x0.5 x1 x1 x0.75

Firing Modes

  • NORM (Primary mode) - It fires a single shot when the trigger is pulled.
  • AUTO (Secondary mode) - It fires bullets continuously until the player stops pulling the trigger or the magazine runs out of ammunition.


  • Upgrade 1 - Reduces reload time by 2/3 and increases damage by 10%.
  • Upgrade 2 - Increases clip size from 36 to 72 and increases damage to a total of 25%.


One can be found in Hydroponics Deck Sector A on the floor beside a dead body


  • When using the right type of ammunition, this weapon can pin any enemy down within 5 shots, including Rumblers.
  • Although not as deadly as the Grenade Launcher, the Assault Rifle uses the most common types of ammunition in the game, making it one of the most practical ranged weapons.
  • Since the Assault Rifle uses the same ammo as the Pistol and is a far better weapon, you might as well drop the pistol once you are able to use it. 
  • It is the most durable Standard Weapon in the game.
  • AUTO mode of this weapon drains ammo at an incredibly rapid rate.You should only use it when surrounded by multiple opponents, a situation which rarely occurs in the game.


  • The assault rifle located in the armory on the MedSci Deck is unbreakable and has reduced recoil. It will still decay, but will never jam regardless of its condition.[1]

See Also