Yes, 10+1 denotes a 10 round magazine. The +1 is 1 in the chamber then adding a round back into magazine to make it 10+1. A clip is a mechanism that holds rounds together to load in a firearm then is set aside to reload. A mechanism that stays in the firearm to hold your rounds while your firing the firearm is a magazine. 10+1 magazine fed firearms are legal in NY as far as capacity goes.

Tim - This is perfectly within the law for the "10 round magazine" states. The magazine holds 10 rounds, and that is where the law applies.

Tim, yes it is perfectly legal. All State/Federal laws reference the "Magazine Capacity" only with regards to firearm capacity and not the total loaded capacity of the firearm (which is the +1 chambered round which does not count towards the Magazine capacity limit).

yes a 10 +1 gun is NY legal as New York State limits the magazine capacity of new handguns to 10 rounds