Oklahoma Possession of A firearm/weapon by a child is the illegal possession of a firearm or weapon by a person under the age of 18 in the state of Oklahoma. It is a felony offense in Oklahoma for someone under the age of 18 to possess any type of firearm or weapon, even if the person does not use, brandish, or display the weapon. There are two types of Oklahoma Possession of A firearm/weapon by a child: constructive possession and actual possession. Constructive possession is when a person has control, ownership, or power over the firearm or weapon, without actually having physical possession of it. Actual possession is when a person has physical possession of the firearm or weapon. Penalties for Oklahoma Possession of A firearm/weapon by a child can include fines, jail time, and probation.