Okla. Stat. tit. 21, § 1289.7

FIREARMS IN VEHICLES A. Any person who is not otherwise prohibited by law from possessing or purchasing a firearm and is not carrying or transporting a firearm in the furtherance of a crime may transport in or on a vehicle a firearm, loaded or unloaded, at any time. B. Any person, eighteen (18) to twenty (20) years of age, who is not otherwise prohibited by law from possessing or purchasing a firearm and is not carrying or transporting a firearm in the furtherance of a crime may transport in or on a vehicle, open or concealed, an unloaded firearm at any time. C. It shall be unlawful for any person transporting a firearm in or on a vehicle to fail or refuse to identify that the person is in actual possession of a firearm when demanded by a law enforcement officer of this state during any arrest, detainment or routine traffic stop. Any person who violates the provisions of this subsection may be issued a citation for an amount not to exceed One Hundred Dollars ($100.00).