Hiya the Orvis shop just down from the Rockefeller centre sells lots of hunting gear it's not cheap but it's not rubbish either my wife got me some camo gloves I wore them to death they lasted nearly 10 years bazil
Nope! I asked the same question before I went. There are some stores that might be good for ancillary items, but a complete absence of the hunting megastores that I envisaged were on every corner in the USA.
Are we talking Manhattan Island New York or New York State?
Manhattan island has quite restrictive gun laws so its doubtful you will find much around, if you could drive out to a different more liberal state then probably no problem.