California Magazine Limit: 10 Rounds

California Penal Code section 16740 defines a large-capacity magazine as any ammunition feeding device with the capacity to accept more than 10 rounds. A feeding device permanently altered so that it cannot accommodate more than 10 rounds, a .22 caliber tube ammunition feeding device, and a tubular magazine contained in a lever-action firearm are excluded.

Section 32310(a) covers manufacturing, importing, keeping or offering for sale, giving, lending, buying, and receiving, and section 32310(c) adds possession regardless of when the magazine was acquired. In Duncan v. Bonta, the Ninth Circuit left the district court's injunction in place for magazines acquired and possessed lawfully before that court's September 22, 2023 order, while the rest of the section is in force; the cert petition in that case (No. 25-198) was still pending on October 20, 2026.

There is no federal magazine capacity limit; the 1994 federal assault weapons ban expired in 2004.

Federal baseline verified 2026-10-20. Scope: Detachable magazine round-count restrictions for handguns and long guns. States not listed have no capacity limit.