Comment: Look at the documentary on

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In reply to comment: Prove it. I've looked into (see in situ)

Look at the documentary on

Look at the documentary on youtube where they've got an ar lower functioning for a hundred rounds. Or the magazines that now work just as good as manufactured mags.

It's true that the good printing tech is highly expensive. But the tech is being streamlined to the public as fast as possible. You'll probably see "toy" 3d printers for kids later this year. 10-15 years from now, it will be very affordable to print off very sound gun parts.