Err...
I don't know about this alleged "2 of 3 of the following" idea, but in California it is not legal to own any long barrel weapon with a pistol grip, any weapons with a flash supressor, or any weapon with a large capacity magazine. (among other things it cannot have/perform... as well as ammo regulations)
While we're blessing things with sarcasm I'd like to bless the drug wars of LA in the last half of the 20th century; bless them for helping spread gangs to northern California and bless them for legal regulations which don't affect criminals. Whoo!
So... if we are talking about California, then I think DeadBreed is closer to correct than being a complete forking retard. The only part of his post I call in to question is the "2 of 3" rule (which I have never heard, and I find nonsensical) as a description for Particles posted weapon as being illegal; that he might be called a retard on, but it may as well have been his informant misinformed him.
Anyway... chill out man. It's not the end of the world. No need to flip out.