Penal Code section 16525

(a)

As used in Section 33700, “firearm barrel” means the tube, usually metal and cylindrical, through which a projectile or shot charge is fired. A firearm barrel includes any forging, casting, printing, extrusion, machined body, or similar article that has reached a stage in manufacture where it may readily be completed, assembled, or converted to be used as a firearm barrel, or that is marketed or sold to the public to become or be used as a firearm barrel once completed, assembled, or converted. A firearm barrel may have a rifled or smooth bore.

(b)

A firearm barrel that is attached or affixed to a firearm is not subject to the requirements of Section 33700.

Source: Section 16525, https://leginfo.­legislature.­ca.­gov/faces/codes_displaySection.­xhtml?lawCode=PEN§ionNum=16525.­ (updated Jan. 1, 2026; accessed Dec. 29, 2025).

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Verified:
Dec. 29, 2025

§ 16525's source at ca​.gov