- "Heavy duty 20.0 inch barrel greatly increases muzzle velocity and extends range. M203 handguard adds substantial weight for smoother handling."
- — In-game description
The Stock M16 Grenadier is a barrel attachment featured in Call of Duty: Modern Warfare and Call of Duty: Warzone. It is uniquely and only available to the M4A1 assault rifle. It is an M16-style barrel. It can be used in conjunction with the M203 grenade launcher. It reduces movement speed and ADS speed significantly, but increases damage, range, and recoil control.