NEW YORK (CBSNewYork) — There has been dramatic move to stop the gun violence plaguing city streets.

A Queens man was recently busted with an untraceable arsenal of weapons that he was allegedly making with parts ordered on the internet. They're called "ghost guns," CBS2's Marcia Kramer reported Thursday.

When city politicians talk about the unrelenting wave of gun violence here, they often blame it on the so-called "Iron Pipeline," guns imported here from the South. Now, cops are trying to shut down what they call the "Polymer Pipeline," guns assembled in neighborhoods all around the city with cheap plastic parts that are increasingly blamed as one of the reasons for our gun epidemic.

"These are weapons that would have been used and cannot be used now," Queens District Attorney Melinda Katz said.