No, thank you.
1) Criminals will never sign up, so the only ones bearing the cost will be those who want to legally own guns.
2) Having the equivalent of an entrance exam to exercise a fundamental, individual right is a monumentally bad idea. Why not just have a civics exam before one can vote, and a grammar test before one is allowed to write letters to their Congressfolks?
3) Costs = astronomical.
4) Potential for abuse = gigantic.
5) Amount of anticipated federal meddling = gargantuan.
A gunfight is not the time to learn new skills.
If you ever have a real need for more than a couple of magazines, your problem is not a shortage of magazines. It's a shortage of people on your side of the argument. -- Art Eatman