Sec. 2. On and after the date upon which this act takes effect, no unnaturalized foreign born person and no person who has been convicted of a felony against the person or property of another or against the government of the United States or of the State of California or of any political subdivision thereof shall own or have in his possession or under his custody or control any pistol, revolver or other firearm capable of being concealed upon the person. The terms “pistol,” “revolver,” and “firearms capable of being concealed upon the person” as used in this act shall be construed to apply to and include all firearms having a barrel less than twelve inches in length. Any person who shall violate the provisions of this section shall be guilty of a felony and upon conviction thereof shall be punishable by imprisonment in a state prison for not less than one year nor for more than five years.