What component is NOT typically part of an Improvised Explosive Device (IED)?

The correct choice is the presence of explosive residue. While explosive devices, including IEDs, are designed to detonate and produce explosive effects, the term "explosive residue" refers to the remnants left behind after an explosion has occurred. This residue is not a functional component of the IED itself, but rather the byproduct resulting from its activation.

On the other hand, a container, initiator, and main charge are fundamental elements of an IED. The container holds the various components together; the initiator is responsible for starting the explosive reaction, and the main charge is the primary explosive material designed to cause the desired destruction. Therefore, explosive residue as a leftover material is not part of the device's construction or purpose, making it the correct answer to the question.