Carrying a handgun in public circumstances

In Oklahoma (under state law), private sales of firearms are legal. However, knowingly selling a firearm to a person who cannot legally purchase or possess the firearm (such as a convicted felon, minor, or drug addict) is illegal, and punishable by up to 180 days in jail. Under state law, you must be 18 to buy a firearm of any type (handguns or long guns) from a private seller.
Prohibited Persons

Felons, mentally ill persons, drug addicts, and certain juvenile offenders are prohibited from buying or owning firearms. You must be 18 years of age to possess or own firearms, with a few exceptions for special circumstances. When purchasing a firearm from a dealer, you must complete a federal background check. This process (passing the background check) usually only takes a few minutes, but the government has up to three days to complete the background check. After three days, the dealer has the right to proceed or deny the transfer. There is no limit to the number of firearms that a person may buy or own under state law.
Minors and Firearms

Minors may own firearms that are given to them by their parents, relatives, or legal guardians. However, they may not generally possess firearms unsupervised until they are 18 years of age. There are exceptions to this rule, such as when a minor possessing a hunting license (and having passed a hunter's safety course) is hunting, possession of firearm(s) on certain types of private property, and possession of firearm(s) in one's own home.
NFA Firearms

Owning or possessing a short-barreled shotgun or rifle is illegal and a felony under state law, unless the short barreled firearm is registered under the National Firearms Act. Owning or possessing a fully automatic firearm is not illegal under state law, but is still illegal under federal law unless the automatic firearm is registered under the National Firearms Act. Local and State authorities are not obligated to enforce federal firearms law or notify federal authorities of federal firearms law violations, however they may, or may not, choose to do so.
Carrying Firearms in Public

Carrying a handgun in public circumstances or on public land requires a valid handgun carry permit, issued by the Oklahoma State Bureau of Investigation. Individuals must pass an extensive background check, meet certain requirements, be at least 21 years of age, and pass a firearms handling and safety course to be issued a permit.[4]
Restrictions on Carrying Handguns