Magazine-fed firearm

Abstract

A magazine-fed firearm has a frame, a barrel connected to the frame and chambered for a cartridge of a first selected specific type, the frame having a magazine well configured to receive a first magazine type configured to contain cartridges of the first selected specific type, the frame including a compatibility facility operable to facilitate operational presence in the magazine well of the first magazine type, and the compatibility facility operable to deny operational presence in the magazine well of a second magazine type configured to contain cartridges of a second specific type different from the first specific type and incompatible with the barrel. The first and second magazine types have a common dimensional characteristic compatible with the magazine well except for interface with the compatibility facility, such that without the compatibility facility, the first and second magazine types are otherwise compatible with the magazine well.

Dependencies are inferred from the claim text.