I'm in NY, dont do it!! I'm not sure what could happen to you, but the buyer is an idiot.
From Wikipedia NY Safe Act:
Reduces definition of "assault weapon" from two identified features to one. The sale and/or transfer of newly defined assault weapons is banned within the state, although sales out of state are permitted. Possession of the newly-defined assault weapons is allowed only if they were possessed at the time that the law was passed
, and must be registered with the state within one year.