Generally, all firearms purchases and transfers, including private party transactions and sales at gun shows, must be made through a California licensed dealer. Contact us online or call at (916) 441-4888 for a free and confidential case consultation, available in Spanish.Section 29800 applies to convicted felons, people convicted of certain specified Misdemeanor crimes, and anyone addicted to a narcotic drug. Weapon charges are extremely serious charges as they involve the possession and use of deadly weapons, particularly the possession and use of firearms. Have you been arrested for a gun crime? Our unlawful gun possession attorney in California can help. In California, a person must be at least 21 years old to buy a handgun, and at least 18 years old to buy a shotgun or rifle. If you've been charged with unlawfully using a weapon, you could face prison time and fines. Felony lawyer David Knoll creates a strong defense. Possession of other firearms and related items is unlawful and may be punished as either a misdemeanor or as a felony.