A sentry gun placed on the 'Mykolayiv' submarine. It is a stationary weapon that disables Sean's ability to move due to its weight. Used for the only time in MAP21: When The Horizon Darkens Most.
- Slot: none
- Type: Projectile
- Ammo: Heavy Missiles
- Damage: 200 HP
- Alternate Attack: none (Sean comments the gun is too heavy for that)