Wow, what a load of rubbish.
Your post can be summarized in 3 sentences:
1) Legitimate militaries will not follow/trust the treaty
2) Uncontrolled individuals/groups will ignore the treaty
3) Something like this has never existed, there is no centrally controlling authority and/or treaties can not work.
You are wrong on all three. I just need to mention the treaty on landmines (Ottawa Treaty). It works. You can control the market and the militaries, at least the bulk of it. Also for chemical weapons there is a treaty, and it works. Even for chemical weapons (Chemical Weapons Convention) the number of incidents from uncontrolled individuals/groups is low.
Some of your points are also rubbish, like:
(X) Requires immediate total cooperation from everybody at once
(X) I don't want the government limiting my arsenal
This is not fantasy, banning weapon technology world-wide has been done before. Countries joined voluntarily, one by one, and are controlled by each other.