Dave, I believe you are missing the point. IF it does not say that they can do something, they can't. The Constitution was written to RESTRICT the power of the Federal government. It's RESPONSIBILITIES are clearly spelled out. They can do NOTHING beyond what the Constitution demands that they do.
I pay NO tax to own a firearm now. I won't then. I won't register it. I refuse. Are they going to send ARMED thugs to enforce it? Good idea? How much force? Will they use DEADLY FORCE? How is that any different than any other murder? It would be murder since the Constitution does NOT give them that authority.
They are already doing it in DC. Current law. Likely coming your way soon since it has already been challenged. Something along these lines is likely what will be pushed.
District of Columbia Official Code 2001 Edition Currentness
Division I. Government of District.
Title 7. Human Health Care and Safety.
Subtitle J. Public Safety.
Chapter 25. Firearms Control.
Full text of all sections at this level Unit A. Firearms Control Regulations.
Full text of all sections at this level Subchapter VI. Possession of Ammunition.
Current selection§ 7-2506.01. Persons permitted to possess ammunition.
(b) No person in the District shall possess, sell, or transfer any large capacity ammunition feeding device regardless of whether the device is attached to a firearm. For the purposes of this subsection, the term “large capacity ammunition feeding device” means a magazine, belt, drum, feed strip, or similar device that has a capacity of, or that can be readily restored or converted to accept, more than 10 rounds of ammunition. The term “large capacity ammunition feeding device” shall not include an attached tubular device designed to accept, and capable of operating only with, .22 caliber rimfire ammunition.
Penalties:
It is also illegal to possess, sell or transfer any “large capacity ammunition feeding device.” A person guilty of this charge can be sentenced to a maximum fine of $1000 and/or up to a year imprisonment. D.C. Criminal Code 7-2506.01.
Pulled this off a gun blog.
"It took $833.69, a total of 15 hours 50 minutes, four trips to the Metropolitan Police Department, two background checks, a set of fingerprints, a five hour class and a 20 question multiple choice exam. Oh, and the votes of five Supreme Court justices. They're the ones who really made it possible for me, as a District resident, to own a handgun."