Data on Ghost Guns?

I am a data nerd. I have found that the most effective way to explain my opposition to most gun control proposals is going to the verifiable data to show why the proposal doesn't actually address crime or deaths.

We have pretty good numbers for things like number of deaths from guns, broken down to pistol, rifle, shotgun, etc from the UCR from the FBI.

Do we have any such data regarding how many deaths each year come from ghost guns? Or possibly how many crimes each year are committed using a ghost gun? I keep seeing people saying 1% on this forum and others, but no one is sourcing that claim.