From what I've been told by my ccw instructor is that it dose not matter if it's an out of state permit or not the state your in is what dictates what laws u r required to fallow and in Oklahoma u r required to be 21yo to Carrie or even legally perches a handgun so just dubble check to keep from becoming a convicted felon and never being able to get one but good luck hopefully u can that would be cool if u can
As I said earlier, I called OSBI and their legal department said you can carry in OK with an out of state permit and be under 21. It must be a legal permit from the state it was issued. This was on May 24th.
These states issue starting at 18: IN, ME, MT, NH, ND, SD, WY, AL, CA, DE, IA, and MD. I don't know which have out of state permits.
Mark