AGM-114L Longbow Missile
The Longbow system incorporates a fire-and-forget RF missile, allowing the Apache to launch from defilade, increasing battlefield survivability. The missile is capable of locking on before or after launch and has been extensively tested in multiple countermeasures.
Developed and built for the U.S. Army by Longbow LLC (a joint venture with Lockheed Martin), it has also been ordered by the British Army.
Video: Longbow Hellfire Missile and Fire Control Radar