Feinstein said her legislation will outlaw the sale, import and manufacture of more than 100 different firearms, including "semiautomatic rifles, handguns and shotguns that can accept a detachable magazine and semiautomatic rifles and handguns with a fixed magazine that can accept more than ten rounds."
The measure would also ban the sale, import and manufacture of "large-capacity ammunition feeding devices (magazines, strips and drums) capable of accepting more than ten rounds."
To protect legal gun owners, the Feinstein measure would "grandfather in" those weapons legally owned at the time the measure would become law. It would also exempt antiques, manually operated weapons, permanently disabled weapons, and more than 900 specifically named firearms commonly used for hunting and sporting.
Industry sources acknowledged that public sentiment after Newtown is unlike that which followed similar attacks over the past decade, because of the presence of so many children among the victims -- and that the NRA will likely face a tougher climate in which to try to forestall the enactment of tighter gun control measures.
But they also indicated that Feinstein's provisions relating to the number of rounds a weapon can accommodate will be contested fiercely. "A standard semi-automatic handgun holds 12 to 14 rounds," one source close to the issue told Fox News. "Everyone would have to retool and new hardware would have to be made. That's going to be very expensive to manufacturers."
Read more: NRA to 'push back' soon, sources say | Fox News