There are 52 DEMs and 109 REPUBs in the MO State legislature. I'd wager that a bill that extreme won''t pass. Even if it did it would be in direct violation of the SCOTUS ruling of June 5 2008 which validated the claim that the 2A applies to individuals, not "military", and several lawsuits would result. The last ruling from SCOTUS was 5-4, which is close. One person can switch it. Several of the judges are old and/or in limited health. And, "accidents' can happen, which would give the Pres an opportunity to stuff the court with Leftists. If that happens, and they nullify the 2A, there will be either a voter revolution or a shooting one.
However, a majority of lawmakers probably will accept the idea that the 2A is not absolute. Just like yelling "fire!" in a crowded theater when no such fire exists is not protected by the 1A, they will probably allow limits to 2A such as magazine sizes. But, I would be surprised if "scary weapon" restrictions are passed.