I'm shipping a rifle, AK style, to a buyer in California. Transfer via FFL of course. I know they are picky down there regarding magazine sizes and all that. So I'm just selling the bare rifle. I asked the buyer to look up an FFL convenient for him. Is there a way for me to verify that thee FFL is good? This is the 1st time I'm selling a gun online so I'm trying to cover all bases. Any other concerns, shipping, .... Any 2cents welcome.