An apparatus and a method to initiate a detonation utilizing an impact switch. A nose assembly is mounted upon a missile or other kind of explosive device. Within the nose assembly conductive elements are separated from one another. The conductive elements are electrically connected to a fuze within the weapon. Upon an impact, the conducting elements within the assembly are forced together thereby completing a circuit in the fuze and initiating a detonation. A method of initiating a detonation utilizes an impact switch within which forcing conducting elements together initiates a detonation.