The MPA Defender Pistols are “Roster Exempt” per CA 12133PC and are considered a single shot pistol.MasterPiece Arms (MPA) Defender series of Pistols has been tested and has met with all of the State of California’s requirements on the sale and ownership of semi–automatic pistols. The California Edition Defender pistols include models for the top and side–cocking 9mm and .45 ACP. MPA redesigned the Defender pistols in their state–of–the–art manufacturing facility in Carrollton, Georgia to meet all California pistol requirements including a single–shot only capability, a permanent muzzle–break and a magazine that is a zero capacity mag and requires the use of a tool to be removed from being deemed a “detachable magazine.”