Think bigger and longer-term. He's not talking about guns, but removing the ability of governments to regulate anything physical. Could you print or cast propellants and make caseless ammo? I bet with some effort you could. Could you distribute that ability in a way that would be utterly impractical to control by any government? Sure.

He's demonstrated the concept with simple things like gun magazines. Theoretically, they're now out of reach of the government to control. Add in more time and better technology, and this concept is potentially a big deal for all manner of things. Interesting to think about at least.

Guns are just a current flash point that it's easy for people to get their heads around. But who knows what tomorrow will bring that governments will try to control only to find themselves unable to do so due to unskilled, cheaply available, distributed manufacturing capability?