My 20yo wants to join a competitive shooting club. What is the minimum age that they can have in their possession a handgun? The OK law references minors, which they are not. They will not be concealed carry, obviously due to their age and the fact that they are not in the military, but will be transferring unloaded and in a gun case from their residence to the range. The federal age to purchase the handgun is 21 but possessing one under 21 appears to be a bit of a blind spot.