The Inert 20mm "Dummy" Cartridge M51A1 is a training round designed to simulate a live 20mm cartridge for military training and weapon testing. The cartridge features a non-functional projectile head and casing, crafted from durable materials for repeated handling and cycling through weapon systems without firing. The M51A1 is engineered to mimic the weight and dimensions of a live round, ensuring realistic training scenarios. This dummy cartridge is used to train personnel in loading, unloading, and handling firearms, allowing soldiers to practice safely without the risks associated with live ammunition