The M121/A1 155mm Projectile was a chemical artillery shell designed for use by the U.S. army. It was designed to be used with approximately 6.5 lbs of GB or VX nerve agents.
The M121/A1 155mm Projectile was a chemical artillery shell designed for use by the U.S. army. It was designed to be used with approximately 6.5 lbs of GB or VX nerve agents.