The LONGBOW system is built by a Joint Venture of Lockheed Martin and Northrop Grumman. U.S. Army testing shows integrated capabilities enhance the Apache lethality fourfold and survivability sevenfold. The mission equipment package is in production for the U.S. and several international customers. The Apache LONGBOW system is a proven force multiplier that has been battle-proven in Operation Enduring Freedom and Operation Iraqi Freedom. The LONGBOW Weapon System has been in full-rate production since 1996, with First Unit Equipped in 1998. Nearly 400 radars and more than 14,000 missiles have been contracted for the U.S. Army and international customers. For the Apache Block III upgrade, a new Radar Electronics Unit (REU) will replace two line-replaceable units. The REU will provide growth capabilities to the LONGBOW FCR and will reduce maintenance cost.