The interceptor is a two-stage missile, with two targeting and guidance systems installed in its nose-tip (a radar and an electro-optical sensor). In 2006 Rafael was awarded a contract to develop a defense system to counter the threat of medium- to long-range rockets with ranges between 70 km and 250 km. In order to enable Israel to make use of the financial aid provided by the United States to further develop the system and to produce it, a partnership was established with Raytheon which will develop the missile firing unit and overall logistic system and assist Rafael with developing the interceptor. In some of Raytheon's publications, the interceptor is referred to as "Stunner." As of November 2012, David's Sling was expected to enter operational service in 2013 or 2014. It has been sug