You cannot have a new, standard AR in NY. You should go to the NYSPRA site and google the NYS SAFE act pages. If the gun is not grandfathered, you have two choices:
1. Something that looks like a standard AR but with a fixed mag that you load through the ejection port with a weird speed loader. Not the fastest.
2. An AR but with a weird stock - there are several options that get rid of the pistol grip and no flash suppressor - just a plain barrel. However, you have the ability to use standard AR 10 round mags. So standard reloads.
Here are some options and info. Never shot these guns, so no idea if they work:
https://www.dark-storm.com/new-york/
Some local outfits will make a compliant gun from Rugers, or SW M&Ps for less. You should look at one, see if you can rent one to see if it appeals to you.
Another option is get a Ruger Mini-14. If it is plain jane - it is compliant. Don't get a 'tati-cool' one that is jazzed up to look EBR. Finally, if you want to move out of 223, Ruger PCC 9mm carbines are popular but without the threaded barrel. Again, don't turn it into a EBR, keep it looking like a rifle.
Now in a alternate universe (rant on), SCOTUS will get off their legal weeds butt and take a case in real time that voids the state bans. That won't happen though, IMHO. They will deal with other agendas but not guns in a manner satisfactory to us. Could be wrong, but that's my view.