Where are you reading that it's stated that a removable magazine becomes an automatic assault rifle ?
I was just pointing out the possibility of why maybe this young men got in trouble with the law over his ak47 in the town of Fishkill.
I believe once the magazine is removable on a AK47 in the state of New York it becomes illegal another factor is the size of the magazine if it's a 30 round or more it also becomes illegal and finally if your not coming or going from your home to the shooting range it becomes illegal just hope...