Nightcrawler, you essentially paid top dollar for the FAL, but that's ok. She's yours now, and that's that. Let's get that gas system set up for you. BTW, setting the gas system is not "playing." Playing conjers thoughts of goofing with things to make it work...much like a cheap pistol. We're going to "set" your gas system, becaus it was built to work in a battlefield, and is adjustable to deal with all kinds of dirt and crud.
Make sure the rifle is unloaded!
Push the gas adjustment wheel to #7 (use the point of a cartridge or a small screwdriver)
load rifle with one round and fire.
If bolt did not lock to the rear (witch I doubt) move the wheel to #6 and try again. Continue this until the bolt stays back. There is a setting between every number (like this 1, 1.5, 2, 2.5, 3, 3.5 and so on) go back and forth with this until the bolt will stay back after the last round reliably. The closer to 7 that you are, the better you are treating your rifle and your shoulder. As the rifle dirties up, you can adjust your rifle closer to setting #1. If you try this and you're still confused, please give us a shout.