Assault weapon" means
(a) a semiautomatic rifle that has an ability to accept a detachable
magazine and has at least one of the following characteristics:
(i) a folding or telescoping stock;
(ii) a pistol grip that protrudes conspicuously beneath the action of
(iii) a thumbhole stock;
(iv) a second handgrip or a protruding grip that can be held by the
(v) a bayonet mount;
(vi) a flash suppressor, muzzle break, muzzle compensator, or threaded
barrel designed to accommodate a flash suppressor, muzzle break, or
(vii) a grenade launcher;
(b) a semiautomatic shotgun that has at least one of the following
NYC: You are allowed to have a 10rd capacity "handgun magazine", but you can only load up to 7rds in NYC (unless you're at the range.)
Revolver with 8rd capacity. only load 7rds in NYC (unless your at the range).
MAGAZINE LIMITS FOR HANDGUNS?
Does New York City have magazine capacity restrictions for handguns?
And we have an answer with citation- thank you. So to be absolutely safe that an ignorant or over-zealous LEO doesn't break my balls, 7 is the limit.
No more than 7 to 10 rounds. It's complicated, with U.S. District Judge William M. Skretny in Erie County & the 2nd Circuit of the United States Court of Appeals rulings striking down the component that had made it illegal for individuals to load more than 7 rounds of ammunition into a magazine capable of holding 10 rounds. However, the law hasn't been changed.
New York prohibits the manufacture, transportation, disposal and possession of any large capacity ammunition feeding device, which New York law defines as a magazine, belt, drum, feed strip or similar device that:
Has a capacity of, or that can be readily restored or converted to accept more than 10 rounds of ammunition;
Contains more than 7 rounds of ammunition; or
Is obtained after January 15, 2013 and has a capacity of, or can be readily restored or converted to accept more than 7 rounds of ammunition.
There are exceptions for attached tubular devices designed to accept, and capable of operating only with, .22 caliber rimfire ammunition or a feeding device that is a curio or relic. There are also grandfather provisions for devices that have the capacity of, or that can be converted to accept, 8-10 rounds, so long as they were lawfully possessed prior to January 15, 2013, and do not actually contain more than seven rounds of ammunition.
[NY Pen. Code § 265.00(23)]
[NY Pen. Code § 265.02(8)]