From the article.
"People drive up and drop off their guns. They do not have to give their names and they don’t have to live in Springfield. In fact, their addresses aren’t even checked, Walsh said.
After the guns are processed, which includes a check to make sure the guns were not used in a crime or stolen from a legal gun owner, they will be destroyed by GunBusters of New England."
So bangers commit a crime get paid for the weapon and get rid of the evidence. Then GunBusters destroys the guns for free. Sounds like a great idea.