I think currently there's four ways: Vanilla artillery, through Zeus (there's a chemical modules tab), IEDs (there's like two in the editor, filter by mod and you should find 'em) and finally by script (search github functions for the scripts)

Thanks

As of right now, the only ones i know work for certain are the Zeus and the IED. The artillery shells are buggy.

I don't see the chemical modules tab in zeus :(