It could take longer then a week actually.
The guys who do the verification do them in batches, every week or 2+ depending on whats going on IRL. They are not paid to do this, so its gets done when it gets done.
Guns in the classified section range from never been opened to seen many years and hundreds of thousands of BBs.
I don't believe the weapons you are looking for will be hard to find, you just gotta be willing to pay for them, and wait.