Preliminary Provisions — California Penal Code — Definitions — "Large-capacity magazine" defined Date: 15 Sep 2016 TEXT PDF Current through the 2016 Legislative Session As used in this part, "large-capacity magazine" means any ammunition feeding device with the capacity to accept more than 10 rounds, but shall not be construed to include any of the following: (a) A feeding device that has been permanently altered so that it cannot accommodate more than 10 rounds. (b) A .22 caliber tube ammunition feeding device. (c) A tubular magazine that is contained in a lever-action firearm. Ca. Pen. Code § 16740 Added by Stats 2010 ch 711 (SB 1080),s 6, eff. 1/1/2011, op. 1/1/2012.