MK77 750lb Napalm
MK78 500lb Napalm
MK79 1000lb Napalm
A fire bomb is a thin skinned container of fuel gel designed for use against dug-in troops, supply installations, wooden structures, and land convoys. The MK 77 500-pound fire bomb is the only fire bomb now in service. Fire bombs rupture on impact and spread burning fuel gel on surrounding objects. MK 13 Mod 0 igniters are used to ignite the fuel gel mixture upon impact.
The MK-77 is a napalm canister munition. The MK77 familiy is an evolution of the incendiary bombs M-47 and M-74, used during the conflict in Korea and the war in Vietnam. Napalm is an incendiary mixture of benzene, gasoline and polystyrene. The Marine Corps dropped all of the approximately 500 MK-77s used in the Gulf War. They were delivered primarily by the AV-8 Harriers from relatively low altitudes. MK-77s were used to ignite the Iraqis oil-filled fire trenches, which were part of barriers constructed in southern Kuwait.
The containers of napalm bomber are very light and fabricated of aluminum, with a capacity for about 75 gallons of combustible gel. They lack stabilizing fins, and consequently acquire a tumbling motion on being dropped that contributes to the scattering of the combustible gel over a wide area.
While the MK-77 is the only incendiary munition currently in active inventory, a variety of other incendiary devices were produced, including the M-47 Napalm bomb, the M-74 incendiary bomb, and white phosphorous and munitions manufacturing. Production of these devices continued during the Korean conflict, though various demilitarization and decontamination programs were initiated in the late 1950s. Munitions destroyed included M-47 Napalm-filled bombs and incendiary cluster bombs.
http://www.fas.org/man/dod-101/sys/dumb/mk77.htm