- "Heavy duty extended barrel extends muzzle velocity and range to the max, but hinders mobility."
- — Gunsmith description
The 400mm Stainless Steel is a Barrel-class attachment featured in Call of Duty: Modern Warfare and Call of Duty: Warzone.
The 400mm Stainless Steel is a Barrel-class attachment featured in Call of Duty: Modern Warfare and Call of Duty: Warzone.