Here is a flowchart that attempts to answer the question we all get all the time: "Is this rifle legal in New Jersey?" Please check it out and see if you think it's right. Did I miss anything?
Once we get it right, I'll release it to the public domain and anyone can use it.
-Dave
Version 3 adds specific wording for bolt-action, since that's probably the most common non-semiautomatic rifle action, and adds break-open action rifles. I lumped lever, pump and break-open into the same question.