I think that smaller (portable) versions are currently almost impossible to make. Square-cube law is a big factor here, and there would be a ton of inaccuracy.

I think that smaller (portable) versions are currently almost impossible to make. Square-cube law is a big factor here, and there would be a ton of inaccuracy. Maybe if it was done very well. Coil guns are more feasible and can probably be much more efficient, so more powerful, at smaller scales.