nalties for a first time offense are a maximum of 30 days in jail, confiscation of the firearm(s) illegally

Handgun carry permit holders must have their license on their person while they are carrying.
Penalties for Carrying Without Permit

Carrying a firearm in public, loaded or unloaded, without a permit is generally illegal and a misdemeanor under state law. Penalties for a first time offense are a maximum of 30 days in jail, confiscation of the firearm(s) illegally carried, and a $250 fine. Repeat offenses may be punished by up to 90 days in jail, with an increased fine.
Handgun Carry Reciprocity

Oklahoma recognizes and legally respects all and any out of state handgun carry permits, even if the issuing state does not recognize an Oklahoma carry permit.

Oklahoma §21-1290.26. reads "The State of Oklahoma hereby recognizes any valid concealed or unconcealed carry weapons permit or license issued by another state. Any person entering this state in possession of a firearm authorized for concealed or unconcealed carry upon the authority and license of another state is authorized to continue to carry a concealed or unconcealed firearm and license in this state; provided the license from the other state remains valid. The firearm must either be carried unconcealed and in plain view or fully concealed from detection and view, and upon coming in contact with any peace officer of this state, the person must disclose the fact that he or she is in possession of a concealed or unconcealed firearm pursuant to a valid concealed or unconcealed carry weapons permit or license issued in another state."
Transporting Firearms