A self-contained deployment system for a warhead assembly for a projectile, the warhead assembly comprising a forward module including a precursor warhead and an aft module including a main warhead; said deployment system configured for selectively deploying the warhead assembly from a retracted configuration to a deployed configuration, at predetermined conditions, to thereby provide a longitudinal displacement between the forward module and the aft module; wherein said deployment system comprises an expansion member configured for being accommodated between the forward module and the aft module, and configured for being longitudinally expanded under said predetermined conditions to thereby increase a longitudinal dimension of the expansion member and thereby urge the forward module and the aft module away from one another to provide said longitudinal displacement, wherein said expansion member is in the form of an inflatable member, and said deployment system comprising a forward bracket affixed to the inflatable member and an aft bracket affixed to the inflatable member, the forward bracket being configured to be affixed to the forward module, the aft bracket being configured to be affixed to the aft module; wherein said deployment system further comprises an actuation system for selectively inflating the inflatable member to provide said deployed configuration. said deployment system configured for selectively deploying the warhead assembly from a retracted configuration to a deployed configuration, at predetermined conditions, to thereby provide a longitudinal displacement between the forward module and the aft module; wherein said deployment system comprises an expansion member configured for being accommodated between the forward module and the aft module, and configured for being longitudinally expanded under said predetermined conditions to thereby increase a longitudinal dimension of the expansion member and thereby urge the forward module and the aft module away from one another to provide said longitudinal displacement, wherein said expansion member is in the form of an inflatable member, and said deployment system comprising a forward bracket affixed to the inflatable member and an aft bracket affixed to the inflatable member, the forward bracket being configured to be affixed to the forward module, the aft bracket being configured to be affixed to the aft module; wherein said deployment system further comprises an actuation system for selectively inflating the inflatable member to provide said deployed configuration. said deployment system comprises an expansion member configured for being accommodated between the forward module and the aft module, and configured for being longitudinally expanded under said predetermined conditions to thereby increase a longitudinal dimension of the expansion member and thereby urge the forward module and the aft module away from one another to provide said longitudinal displacement, wherein said expansion member is in the form of an inflatable member, and said deployment system comprising a forward bracket affixed to the inflatable member and an aft bracket affixed to the inflatable member, the forward bracket being configured to be affixed to the forward module, the aft bracket being configured to be affixed to the aft module; wherein said deployment system further comprises an actuation system for selectively inflating the inflatable member to provide said deployed configuration.