No. You don't take firearms through TSA checkpoints. You check them at the baggage counter. And then pray they don't get stolen. Although I've only had firearms stolen when flying through SJU.
I've heard of people traveling with expensive camera gear putting a starter pistol with their checked luggage, because if you declared a baggage as having a gun they can't open it without you being present. Of course this won't deter a sufficiently motivated thief, but it does prevent someone with sticky fingers swiping your stuff during a "random inspection".
https://www.nbcnews.com/news/us-news/us-tourist-faces-12-yea...
“You may use any brand or type of lock to secure your firearm case, including TSA-recognized locks.”
Source: https://www.tsa.gov/travel/transporting-firearms-and-ammunit...