The deployment module, or "bus," carried the MK-21s and housed the electronics that released the re-entry vehicles. When deployed from the bus, each weapon followed a separate ballistic path to its individual target.
Peacekeeper Re-entry Vehicles
and Deployment Bus
The LMG-118A Peacekeeper intercontinental ballistic missile (ICBM) carried 10 nuclear weapons in its Multiple Independently Targetable Re-entry Vehicle (MIRV) warhead. The warhead was part of the missile's fourth stage, which consisted of the deployment module, ten cone-shaped Avco MK-21 re-entry vehicles, and an aerodynamic shroud.