Based on this product's specifications, here are some alternatives and similar models
Nozzle assembly FlashForge AD5M/AD5MPRO 0.4 mm replacement part
Summary description:
Replacement nozzle assembly for FlashForge AD5M and AD5MPRO 3D printers with a 0.4 mm nozzle diameter. Designed to restore or upgrade extrusion performance, it fits specified FlashForge models and ensures consistent filament flow for standard print tasks. Suitable for routine maintenance, wear replacement and improving print reliability in prototyping or small-scale production.