; and (B) is manufactured in such a manner that the firing restriction described in subparagraph (A)— (i) is incorporated into the design of the handgun; (ii) is not sold as an accessory; and (iii) cannot be readily removed or deactivated. (13) Retrofitted personalized handgun The term retrofitted personalized handgun means a handgun fitted with a device that— (A) enables only an authorized user of the handgun to fire the handgun; and (B) cannot be readily removed or deactivated. .