I have bought, sold, and traded several through that website and through texasguntrader. I’ve never bothered with going through a FFL. I looked up the requirements once for getting one, and the main thing that I took away from it was that if you have a FFL, most of your transactions cannot involve yourself or your family members.
> “The vast majority of Armslists transactions are done through an FFL and include a standard federal background check”
Unless the transaction involves two different States, I doubt this.