Provides that no person or entity has the authority to enforce, attempt to enforce, or participate in any way in enforcing particular federal laws concerning firearms, firearm accessories, or ammunition against a law abiding citizen. Specifies penalties and causes of action concerning a political subdivision or law enforcement agency that: (1) employs a law enforcement officer who knowingly violates these provisions; or (2) knowingly employs a federal official who knowingly takes certain actions concerning the enforcement or implementation of federal firearms laws. Specifies exceptions. Makes findings and defines terms.