The Gun is nerfed bad in CoD, imo. I've built both of mine from STG-58 kits on DSA Type I receivers. From the factory the bolt is a little loose and it's not as accurate as a factory M14. That said, I tightened it up a little bit and now I can plink at 150-200 yds hitting pretty much whatever I want. Reliable as hell too, I've never had a jam and I know a guy that had 10k through his gun before cleaning it and it was still running smooth. I just wish they put the Full Auto FAL on CoD. They're some of the coolest guns around.
From what I read on wikipedia, the automatic FAL is illegal in the US, and maybe that is why CoD didn't include it? Dunno...
How easy/cheap is it to build one of these rifles? I wouldn't mind doing it if the price isn't too steep.