I've ordered C mags many times and they were sent to me out of state. Before I was even a PO, my LE buddies never talked about 31+ mags as being illegal. Wasn't till the academy someone brought it up. Plus I have not seen any companies banning orders into OH on 31+ mag. I would have to look up the cases that involved the offense. But the ORC is the LE bible and what it states is the law. Never seen this law enforced when it comes to magazines. Not even sure how well it will float in court as a lone charge. Chances are the judge would laugh at me if my only PC was that I thought or to the best of my knowledge knew that the magazine could hold 31 or more rounds.
Possible charge: 2923.17(A) No person shall knowingly acquire, have, carry, or use any dangerous ordnance.
If found guilty: 2923.17(D) Whoever violates division (A) of this section is guilty of unlawful possession of dangerous ordnance, a felony of the fifth degree.
Definitions:
ORC 2823.11(E) "Automatic firearm" means any firearm designed or specially adapted to fire a succession of cartridges with a single function of the trigger. "Automatic firearm" also means any semi-automatic firearm designed or specially adapted to fire more than thirty-one cartridges without reloading, other than a firearm chambering only .22 caliber short, long, or long-rifle cartridges.
ORC 2823.11(K) "Dangerous ordnance" means any of the following, except as provided in division.
(1) Any automatic or sawed-off firearm, zip-gun, or ballistic knife;
(2) Any explosive device or incendiary device;
(3) Nitroglycerin, nitrocellulose, nitrostarch, PETN, cyclonite, TNT, picric acid, and other high explosives; amatol, tritonal, tetrytol, pentolite, pecretol, cyclotol, and other high explosive compositions; plastic explosives; dynamite, blasting gelatin, gelatin dynamite, sensitized ammonium nitrate, liquid-oxygen blasting explosives, blasting powder, and other blasting agents; and any other explosive substance having sufficient brisance or power to be particularly suitable for use as a military explosive, or for use in mining, quarrying, excavating, or demolitions;
(4) Any firearm, rocket launcher, mortar, artillery piece, grenade, mine, bomb, torpedo, or similar weapon, designed and manufactured for military purposes, and the ammunition for that weapon;
(5) Any firearm muffler or silencer;
(6) Any combination of parts that is intended by the owner for use in converting any firearm or other device into a dangerous ordnance.
Funny part is with the right permits you can own a automatic or silencer. Anyone in the Columbus area ever visited Aumiller Gunshop in Westerville? Dan the owner sells sawed offs - 50cal machine guns. The man even had a semi-auto drum fed shotgun.