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GBU-39 series
The GBU-39 Small Diameter Bomb (SDB) is a precision-guided aerial bomb in the 250-pound weight class, developed and predominantly produced in the United States. The GBU-39 has been produced in several variants with differing warhead configurations, most containing 16–17 kg of explosive composition - a relatively small 'payload' for an air-delivered bomb.
The weapon is fitted with a wing assembly that permits longer, flatter ‘gliding’ attack vectors - giving it a range of more than 110 km from the release point. It has four tail-fin control surfaces to adjust the munition’s trajectory in flight in response to GPS and inertial guidance, thus improving precision.