That is unfortunate, but true. The government does disregard the Constitution quite often.
There is a Nobel Prize in it for whoever designs a self-correcting government. Or at least a way to get an established government to follow it's own rules.
*glances Northward*
Lookin' right at you Trudeau...
But as to home brewed firearms... We've been doing this, literally, since we were Colonies. Locksmiths teamed up with Blacksmiths to create the various spring/trigger mechanisms and modernization of smithing/machining has almost universally been led by the private sector. Cody Wilson is just the latest in a long line.
Instead of celebrating our entrepreneurial spirit and the expression of our Individual Rights... We're being demonized at every turn. Er... again.