Forgings are not needed to make a firearm, only to make them as light as possible.

This last week I visited our internal shop. We have two large laser sintering machines. One is set up to to fuse tool steel. The other sst. Only the functional surfaces need to be fine finished. I expect either would be easily able to make a receiver.

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I suspect this business of requiring gun insurance will fall by the side. And will be discriminatory. Live in the wrong neighborhood you won't be able to afford it. I'll bet it could be argued that failing to have it would unenforceable. That pesky 2nd amendment again.

But the bigger problem, it's essentially a form of gun registration. Enlisting a NGO to do far more than what the government, can't and shouldn't do.