Description
The projectile is a hollow, deep cavity steel shell containing essentially a burster, and agent GB. Burster M71 is a thin metal cylinder filled with Composition B extending through the center of Burster Casing M15. The remainder of the interior space of the projectile is filled with liquified GB agent. The neck of the burster tube seeds the agent cavity. The nose of the steel projectile is closed with a threaded adapter to seal in the burster tube and also to provide a fuze receptacle. For shipment and handling, an adapter-type lifting plug is installed in the fuze cavity. A point detonating (PD) fuze is installed before loading the weapon. A rotating band encircles the projectile near the base and is protected by a grommet during shipment and handling.
The T77 version of this projectile was produced during WWII and was an effort to get chemical rounds produced quickly. It is an altered conventional 155mm round. The nose of the conventional round was removed and a chemical nose was welded to the body. The only visible difference between the T77 and the M121 is the weld mark that indicates where the chemical nose was welded to the body. All T77 versions have one green band where the M121 will have one green band if produced before 1961 and three green bands if produced after 1961.
Functioning
No information about functioning.
Hazardous Components
No information about hazardous components.
See Also
Nothing else to see.
Source(s)
Old Chemical Weapons and Related Materiel Reference Guide (2018)
Old Chemical Weapons Reference Guide (1998)
