That could explain some of the stupid things he said, but not the part about firing 30 rounds (which is obviously what he meant) in half a second.
Then again, if he believes that, he is just too stupid to be in the office he currently occupies.
Ghost guns are 3d printed or other firearms made with absolutely no metal. They are already banned in the US, and for good reason.
A quick run though of his law by ABC News seems like it is pretty much a perfectly justifiable law and I all honesty, I cant see fault with the items ABC commented on.
'Ghost Gun' Regulations Pushed in California Bill - ABC News