 The KAB-500Kr is analogous to the American GBU-15 weapon.It uses a standard Soviet/Russian FAB-500 general-purpose bomb, with a nominal weight of , as a warhead, adding a low-light television seeker and guidance fins to turn it into a guided, unpowered glide bomb.The bomb is long and weighs , of which is a hardened, armor-piercing warhead capable of penetrating up to of reinforced concrete.