I just sent this to Senator Wyden for his consideration:
After several thousand pages worth of reading concerning the Second Amendment, I've come to the conclusion that there is a way past the reactionary NRA faction's obstinacy about what Congress can do concerning gun control. As the Amendment stands, the NRA and Gun Owners of America's most strident interpretation is correct -- but the Amendment does not stand alone. I was reminded of this in principle when perusing the remarks of Justice Souter in his commencement address at Harvard, specifically that no piece of the Constitution may be taken in isolation.
Here is where the key lies:
"The Congress shall have power... To provide for organizing, arming, and disciplining, the militia,...."
--Art I Sec 8.
It seems plain to me that setting restrictions on what firearms may be carried for common use, i.e. for keeping and bearing, comes under the authority given for "organizing... and disciplining, the militia". This would cover one of the items of current immediate attention, namely the size of magazines for semiautomatic weapons. Under the militia concept in the eighteenth century, arms not considered appropriate for common use were not banned for citizens, but were required to be stored in appointed places for arms for the militia; specifically, they were stored in arsenals under the command of the militia's officers. Congress power certainly extends to defining magazines which contain more than, say, twenty rounds as not appropriate for keeping and bearing for everyday purposes -- and to require those who own such to have them stored at an appropriate facility, under lock and key, for use at that facility (or in competitions).
We have today no arsenals, for the simple reason that since the introduction of the National Guard as an organized militia, our unorganized or common militia has lost the habit of training, and communities since roughly the time of the Civil War have ceased organizing citizens' militias. But we have a somewhat comparable institution, something our forefathers didn't have, in the form of the gun club, shooting club, or shooting range, where facilities generally exist where firearms and/or accessories may be stored under lock and key for the use of their owners at those facilities.
Thus the path to follow would seem to be thus: that Congress, under its authority to organize and discipline the militia, specify that any magazines of more than twenty rounds must be stored at a gun club, shooting club, or shooting range, available to the owner as described above. Congress might also appropriate some funds for zero-interest loans to such organizations to provide storage means if such are lacking.
This would be very hard for LaPierre to fight, because it rests solidly in the militia tradition he supposedly defends.