US Cartridge, 4.2 inch HE, M3A1
This cartridge is used against personnel and materiel, providing both fragmentation and blast effect.
The complete round consists of a projectile body a fuze, and a tail assembly. The steel body is designed to accommodate an impact, delay, or proximity fuze. A deep fuze well in the nose, is fitted with a supplementary charge of TNT. This charge is removed to accommodate certain proximity fuzes. The tail assembly consists of a pressure plate and rotating disc, a propelling charge, a cartridge container and ignition cartridge, and a striker nut assembly.
Collaborative Ordnance Data Repository