Hmm that must be a federal thing here is what TN law says and it only applies to state and local parks. Kinda funny because our local National forest has 2 shooting ranges.
39-17-1311. Carrying weapons on public parks, playgrounds, civic centers and other public recreational buildings and grounds. —
(a) It is an offense for any person to possess or carry, whether openly or concealed, with the intent to go armed, any weapon prohibited by § 39-17-1302(a), not used solely for instructional, display or sanctioned ceremonial purposes, in or on the grounds of any public park, playground, civic center or other building facility, area or property owned, used or operated by any municipal, county or state government, or instrumentality thereof, for recreational purposes.
(b) (1) The provisions of subsection (a) shall not apply to the following persons:
(A) Persons employed in the army, air force, navy, coast guard or marine service of the United States or any member of the Tennessee national guard when in discharge of their official duties and acting under orders requiring them to carry arms or weapons;
(B) Civil officers of the United States in the discharge of their official duties;
(C) Officers and soldiers of the militia and the national guard when called into actual service;
(D) Officers of the state, or of any county, city or town, charged with the enforcement of the laws of the state, in the discharge of their official duties;
(E) Any pupils who are members of the reserve officers training corps or pupils enrolled in a course of instruction or members of a club or team, and who are required to carry arms or weapons in the discharge of their official class or team duties;
(F) Any private police employed by the municipality, county, state or instrumentality thereof in the discharge of their duties; and
(G) Also, only to the extent a person strictly conforms the person's behavior to the requirements of one (1) of the following classifications:
(i) A person hunting during the lawful hunting season on lands owned by any municipality, county, state or instrumentality thereof and designated as open to hunting by law or by the appropriate official;
(ii) A person possessing unloaded hunting weapons while transversing the grounds of any public recreational building or property for the purpose of gaining access to public or private lands open to hunting with the intent to hunt on the public or private lands unless the public recreational building or property is posted prohibiting entry;
(iii) A person possessing guns or knives when conducting or attending “gun and knife shows” when the program has been approved by the administrator of the recreational building or property;
(iv) A person entering the property for the sole purpose of delivering or picking up passengers and who does not remove any weapon from the vehicle or utilize it in any manner;
(v) A person who possesses or carries a firearm for the purpose of sport or target shooting and sport or target shooting is permitted in the park or recreational area; or
(H) A registered security guard/officer, who meets the requirements of title 62, chapter 35, while in the performance of the officer's duties;
(2) At any time the person's behavior no longer strictly conforms to one (1) of the classifications in subdivision (b)(1), the person shall be subject to the provisions of subsection (a).
(c) (1) Each chief administrator of public recreational property shall display in prominent locations about the public recreational property a sign, at least six inches (6²) high and fourteen inches (14²) wide, stating:
MISDEMEANOR. STATE LAW PRESCRIBES A MAXIMUM PENALTY OF ELEVEN (11) MONTHS AND TWENTY-NINE (29) DAYS AND A FINE NOT TO EXCEED TWO THOUSAND FIVE HUNDRED DOLLARS ($2,500) FOR CARRYING WEAPONS ON OR IN PUBLIC RECREATIONAL PROPERTY.
(2) As used in this subsection (c), “prominent locations about public recreational property” includes, but is not limited to, all entrances to the property, any building or structure located on the property, such as restrooms, picnic areas, sports facilities, welcome centers, gift shops, playgrounds, swimming pools, restaurants and parking lots.
(3) The legislative body of any municipality or committee appointed by the body to regulate public recreational property may exempt public recreational property located within its jurisdiction from the requirements of subdivision (c)(1).
(d) A violation of this section is a Class A misdemeanor.
[Acts 1989, ch. 591, § 1; 1990, ch. 1029, § 9; 1993, ch. 480, §§ 1-3; 1996, ch. 1009, § 23.]