Good luck with that........first, as mentioned, there are millions of guns in North America, how do you propose installing said chips? Second, I doubt they could ever make a GPS chip and transponder that would withstand repeated ~2000+PSI shots....third, like guns with internal locks and now biometrics, people won't buy them......fourth 3D-guns make the entire concept moot, within ~ten years, anyone in the world with a 3D-Printer and an internet connection can make their own gun, sans GPS chips......