[carver]

"The law, which goes into effect Nov. 1, will allow those with permits to carry firearms under the Oklahoma Self Defense Act to choose whether to conceal their weapons or carry them openly. The law previously required permit holders to conceal their firearms".

Straight from the link! You will have to have a permit to carry, open, or concealed in OK! This should apply to all concealed carry visitors to the State of OK, if that State reciprocates with OK.

From SB 1733


RECIPROCAL AGREEMENT AUTHORITY
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 or 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. Any person who is twenty-one (21) years of age or older having a valid firearm license from another state may apply for a concealed handgun license in this state immediately upon establishing a residence in this state.