buy ammo. I have had a few commie sumsbeeches for a while, finally got GrandPa Garand to keep the buggers in line in the safe. Fun shooters. Although I have a AR there is something about clanging away with a AK or a variant of, while the AR shooting next to you is clearing a jam.
I've known that I wanted one for awhile, so I started buying ammo before I even had the gun. I only have 120 rounds but its enough to start with. And its one less thing to have to buy right away.