I am familiar with the berreta fiasco, and understand that the CX4 mags themselves were made prohib. and you can legally possess 92/96 mags that hold 10 rounds, but if I remember correctly from many years ago when we were fighting the original c-68 and I was intimately familiar with the wording, it would be prohibited to have a centre fire rifle with a magazine "attached" capable of holding in excess of 5 rounds, ie. if you had a tube fed 223 (I know, I know, just humour me) it could not hold more than 5 rounds, same for shotgun if I remember correctly, no extended magazines on 1100's and such. In the case of the CX4, yes you can have 10 round mags, but legally once you put them into the gun you are technically breaking the law!?
Maybe we should move this discussion to the "legalese" forum.
Ian