A warhead includes a gas containing canister having a front end onto which
is screwed a valve assembly having an interior which is in gas
communication with the canister. A structure-penetrating nose connected
onto the valve assembly. Positioned around a periphery of the valve
assembly is a plurality of hollow frangible plugs. The nose includes a
shoulder portion that shears the plugs upon impact with a target thus
allowing gas within the canister and valve assembly to escape to an
atmosphere.