One thing people don't think about… Do you think the manufacturers would actually sell us machine guns if they all of a sudden become legal? I don't think they would. Do you really think FN and their legal team would think it was OK to put some M249's for sale at bass pro shop lol? As soon as some gangbanger got a hold of one of those legally or illegally, they would just ban machine guns all over again. We're having to fight 24/7 just to keep what we have right now much less making machine guns totally legal to buy. And as far as larger weapons like grenades, tanks etc., those manufacturers would never sell those to everyday Americans because of insurance and liability reasons. The insurance they would have to keep to sell some of those weapons would be unbelievable.
In the end, I don't think any of this is going to happen because we don't have a conservative utopia in this country. We can barely keep what we have right now. The stars would have to lineup so perfectly to get rid of the ATF in the NFA, that it's literally impossible. Now, if we get invaded by another country or something crazy like that, maybe we would see things loosen up as far as the second amendment.