Pennsylvania
I just checked & it mentions that the "on line" PA statutes may not be up to date.
State laws, code, & restrictions change all the time.
You should always check with a qualified lawyer to research your particular specific state statutes & local restrictions before you attempt to carry any additional "device" not directly related to ~ or specifically covered by ~ your state License To Carry a firearm.
A word to the wise should be sufficient.
In PA. with your valid LTC you may carry - properly concealed - any handgun (legally registered to you) as your defensive firearm. Below are considered to be offensive weapons.
"Pennsylvania Offensive weapons."
Any bomb, grenade, machine gun, sawed-off shotgun with a barrel less than 18 inches, firearm specially made or specially adapted for concealment or silent discharge, any blackjack, sandbag, metal knuckles, dagger, knife, razor or cutting instrument, the blade of which is exposed in an automatic way by switch, push-button, spring mechanism, or otherwise, or other implement for the infliction of serious bodily injury which serves no common lawful purpose.
§ 907. Possessing instruments of crime.
(a) Criminal instruments generally.--A person commits a misdemeanor of the first degree if he possesses any instrument of crime with intent to employ it criminally.
(b) Possession of weapon.--A person commits a misdemeanor of the first degree if he possesses a firearm or other weapon concealed upon his person with intent to employ it criminally.
(c) Unlawful body armor.--A person commits a felony of the third degree if in the course of the commission of a felony or in the attempt to commit a felony he uses or wears body armor or has the control, custody or possession any body armor.
(d) Definitions.--As used in this section, the following words and phrases shall have the meanings given to them in this subsection:
"Body armor."
Any protective covering for the body, or parts thereof, made of any polyaramid fiber or any resin-treated glass fiber cloth or any material or combination of materials made or designed to prevent, resist, deflect or deter the penetration thereof by ammunition, knife, cutting or piercing instrument or any other weapon.
"Instrument of crime."
Any of the following:
Anything specially made or specially adapted for criminal use.
Anything used for criminal purposes and possessed by the actor under circumstances not manifestly appropriate for lawful uses it may have.
"Weapon."
Anything readily capable of lethal use and possessed under circumstances not manifestly appropriate for lawful uses which it may have. The term includes a firearm which is not loaded or lacks a clip or other component to render it immediately operable, and components which can readily be assembled into a weapon.
Please Note: None of the above information should be considered to be correct legal advice. Check your intent with a Pennsylvania lawyer before you decide to carry any additional device in PA. other than your primary defensive firearm.