Can you put a grenadelauncher on a p90?

While it is technically possible to mount a grenade launcher on a P90 with the right modifications, it is not a common practice due to the design and intended use of the weapon. The P90 is primarily a compact personal defense weapon optimized for close-quarters combat and is not typically designed to support external attachments like grenade launchers. Additionally, doing so could affect the weapon's balance and performance. Always consider legal regulations and safety when modifying firearms.