This Mk. 77 is an unguided incendiary weapon used by the U S military. The Mk. 77 uses a fuel gel mixture that is similar to napalm, with similar effects when dropped. The Mk. 77 was used in Operation Desert Storm to destroy oil/fuel filled trenches and obstacles created by the Iraqis.
The set includes parts for two complete cannisters, each comprised of a tapered nose section, a barrel shaped center section and a tapered tail section. While the nose and tail sections are similar, they are not identical. The set also includes three different types of fuses for each cannister, and the instructions illustrate some of the fuse combinations available.