An attempt of creative tracing. If I could call it anything else, it would be the FHG-50 Kriss SMG.
This unique SMG has a recoil sping that fires downwards, attempting to mitigate recoil, thus making it easy to use. There are two variants of this SMG that make it better than its Mark 1 counterpart. However, said and done, it is a unique-looking gun.