I have a toy Yoda. What's it worth, do you think?
Seriously, though, could this technology one day be made wireless and - if so - could the Government turn off the guns belonging to "X"? Or require the presence of a government-issue chip in order to make the firearm functional?
Maybe it seems like tin foil stuff at first, but I don't doubt that universal gun registration and such wireless technology would one day combine along those lines.
It is best if government maintains a healthy respect for an independent, armed citizenry. I don't see how this German technology improves or promotes such a relationship.