and 3D printed ‘ghost’ guns..................
When the “news” talks about “ghost guns”, they usually allude to 3-D printed or home finished (80%, or kit-guns) firearms.
However any (stolen) gun with a defaced serial number is also included in this category.
In my limited research, I haven’t found any numbers on how many printed or 80% firearms were used in violent crimes.
I’ve seen a few anecdotal instances, but most appear to be used by people that are not legally allowed to have any guns.