Gun City USA remains open for business, but the self-described largest and oldest gun shop in Nashville can no longer sell guns. On Dec. 1, Gun City's federal firearms license was revoked after years of regulatory violations, barring the store from buying, selling or repairing guns. The store had challenged the U.S. Bureau of Alcohol, Tobacco, Firearms and Explosives' revocation, but a federal judge in October denied its appeal. "Their license expired, or was revoked,... (GunPolicy.org)