Actually, no. Since Nova ships all products from Toronto, buying a laser from them is considering importing it. Since all X-Series are greater than 5mw, and none of them have the proper safety features or FDA Accession numbers, it is COMPLETELY ILLEGAL for you to buy an X-Series laser in the US and have it shipped to you. It is a violation of federal law, there is no "technically" to it, it is illegal.
Now, will you get caught? Probably not. If you do get caught, will you lose your laser? Yes. If they just confiscate it, will Nova ship another one? Yes.
But the most important question, is it getting confiscated all that can happen? NO. The government, if it saw fit, would be completely justified and within the law to fine you thousands of dollars and put you in jail. According to previous experience of people here and other places online, it getting confiscated would probably be all that happens, so it's up to you if you think it's worth the risk. But you have to understand all the risks before you can make a good decision.