NYS Assault Weapon Ban TextBasically you can have an AR-15 as long as it doesn't possess more that one evil feature (Pistol Grip, Flash Supressor or threaded barrel able to accept a flash supressor, Collapsable Buttstock, and a Bayonette Lug). Since they all have a Pistol Grip, that's usually the pasrt that fills the allowed part list.
Rifles that left the factory as a full assembled rifle before September 13, 1994 are grandfathered (preban) may possess the "evil Features."
As with all long guns it must have a barrel of at least 16 inches in length and an overall length of 16 inches. (Shotguns must have 18 inch barrels). A permenantly attatched muzzle device may be added to make the overall length of the barrel 16 inches (Muzzle Brake/Compensator).
Magazines made after September 13, 1994 may not hold more than 10 rounds.
And Yes, you can use preban magazines in a Post ban weapon