 The GEM series of missiles (MIM-104D/E) are further refinements of the PAC-2 missile.The PAC-3 missile is a new interceptor, featuring a Ka band active radar seeker, employing "hit-to-kill" interception (in contrast to previous interceptors' method of exploding in the vicinity of the target, destroying it with shrapnel), and several other enhancements which dramatically increase its lethality against ballistic missiles.The specific information for these different kinds of missiles are discussed in the "Variants" section.