5-10 round magazines are all that civilian semis require.
Dwayne man, I know you love shooting as a hobby, but you must see that even that sounds pretty crazy.
They should get rid of all military style weapons, and anything more than hunting style double barrel shotguns. I know that might sound daft coming from me, but it's surely a very real solution isn't it? Sure, damage can still be done with a hunting rifle, but it'd be much more limited, particularly in the hands of Spazzy McIsisface.