Texas Instruments BOLT-117 Laser Guided Bomb The BOLT-117 (BOmb, Laser Terminal) was the world's first laser-guided bomb (LGB). Used by U.S. Air Force F-4 Phantoms in the Southeast Asia War, it consisted of a KMU-342 laser guidance and control kit attached to a standard, M117 750-pound bomb. The guidance system and control fins were adapted from the AGM-45 Shrike missile. A Weapon System Officer (WSO) in the backseat of an F-4, or in another accompanying F-4, used a hand-operated Airborne Laser Designator to "paint" the target. Meanwhile, the BOLT-117's seeker head "homed in" on the laser energy reflected from the target. While the WSOs had trouble keeping the target painted with hand-held designators in flight, the combat evaluation of the BOLT-117 in 1968 proved highly successful. The USAF discontinued the BOLT-117 in favor of the more powerful 2,000-pound GBU-10 Paveway laser-guided bomb. Later, the BOLT-117 was redesignated the GBU-1. Click here to return to the Southeast Asia War Gallery or here to return to the Precision Guided Weapons Overview. Find Out More Related Fact Sheets McDonnell Douglas F-4C Phantom II Note: The appearance of hyperlinks does not constitute endorsement by the National Museum of the USAF, the U.S. Air Force, or the Department of Defense, of the external website, or the information, products or services contained therein.