sadly other than the date of manufacture, nothing... Unlike the Federal AWB, the NYS AWB did not have an expiration. So we have to have preban receivers if we want things like collapsible stocks, flash hiders and bayonet lugs. We also have to have preban magazines if we want greater than 10 rounds. Speaking of magazines, you are allowed to have a pre-ban magazine in a post ban gun. Some people may not think that is true but it is...

