Folks, just wanted to point out that the receiver essentially is just a piece of metal that holds together the parts. Unless the metal is intrinsically flawed at the metallurgic level, you aren't really going to get performance differences out of different receivers. I own quite a few of each and have not noticed any differences. Like many, I initially shunned CAI builds because of the "angry beaver" stories. However, not all CAI builds are made by angry beavers; some are made by quite peacable beavers. Then too, even the beat-on ones can easily be tuned up with the replacement of a locking shoulder or a bit of barrel adjustment. At 600$ OTD you really can't complain much.
As for your CAI shooting 3" at 100... well Id say thats pretty darn good. The FAL is not a tack driver, it is a military battle rifle. What it gives up in MOA accuracy it makes up for in sheer punch. There are ways to make it a tack driver, but just as with the M1A when you do so you often trade off battlefield reliability and sturdiness. As with everything else, expect each tool to do the job it is designed for. If I want to positively punch several large holes rapidly in a man sized target out to 300 meters, I use a FAL. If I want to put a cloverleaf in a piece of paper 200 meters away, I use my Tikka Tactical. Different tools, different jobs.
ps: is that your butt hauling the cardboard back? I'm glad you decided to share ROFL