transfers need to go through dealers.
Bringing in existing ARs can be as easy as adding a bullet button and 10 round magazines, and making sure you don't have any of the other prohibited features, or it can be even simpler, if it's on the banned by name list, you can't bring it in, period, do not pass go, do not collect $200.
The best bet would be to check out the stickies at the top and then see if you have more questions. The AW laws were an evolving progression, started with banning by name, until it became clear changing the name was an easy way around for some companies and people. Then they banned by features, and what a surprise, avoid the features, and then they tried another method and that got thrown out by the courts, so now we have AR again. albeit almost neutered.