The KAB-500L is analogous to the U.S. Paveway series: it is a standard FAB-500 general-purpose bomb, which has a nominal weight of 500 kg (1,100 lb), fitted with a semi-active laser seeker and guidance fins, turning it into an unpowered guided bomb.
The KAB-500L is 3.05 m (10.0 ft) long and weighs 525 kg (1,157 lb). Its warhead makes up 450 kg (990 lb) of the total weight, of which roughly 50% is blast-effect high explosive. Russian sources credit it with a CEP of 7 meters (23 feet). The technology of KAB-500L is also used for larger bombs, such as KAB-1500L family.
KAB-500S-E is a Precision-Guided Munition (PGM) whose guidance system is based on GLONASS. The weapon can be dropped from aircraft flying at an altitude from 500 meters to 5000 meters and airspeed of 500 - 1150 KMPH. The CEP is between 7 - 12 meters. These bombs have been used for the first time by Russians in Syria when they launched their first airstrikes in September 2015.