Which of these is NOT classified as a "Destructive Device" under Section 921 Title 18 of U.S. Code?

A device used for crowd control is not classified as a "Destructive Device" under Section 921 Title 18 of U.S. Code because the law specifically targets items that are designed to inflict significant harm or destruction, such as missiles, bombs, grenades, and rockets with a certain level of propellant. Crowd control devices, on the other hand, are typically intended for use in managing public safety situations and often include items like tear gas or rubber bullets, which are not primarily designed to destroy. The focus of the legal definition is on weapons designed to cause serious bodily harm or destruction rather than tools that are used to pacify or manage situations without lethal force.