A few weeks ago, I purchased a few 40-round mags for my M1 at a gunshow. Earlier today, I stumbled onto the regulations below at the NRA website. Are these 40-rounders illegal? (Refer to last sentence) Should I keep 'em, sell 'em, or hide 'em in the basement? Thanks. NATIONAL FIREARMS ACT FIREARMS AND CERTAIN OTHER FIREARMS In the Ohio code, the term "dangerous ordnance" includes: automatic firearms; short barreled rifles and shotguns; firearms of "crude or extemporized manufacture"; and devices that are not designed as firearms but can be adapted for use as firearms, or are capable of being used as firearms. "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."