Ammunition magazine with asymmetric feeding

A firearm having a magazine well, said firearm comprising:

• a stock assembly comprising one of a bolt or a slide and a receiver, wherein the receiver is configured for use with cartridges of a first size, and wherein a centerline of the bolt or slide is in a first plane;
• a forend assembly;
• and
• a magazine releasably insertable into the magazine well;
• wherein the magazine comprises:
• an elongated housing having a distal end and a proximal end, a first plate removably engaged with the proximal end of the elongated housing, a spring, a follower, the follower configured to move within the elongated housing based in part on a compression and decompression of the spring, feedlips positioned at the distal end of the elongated housing;
• wherein the first plane passes through the first plate and wherein the housing is shaped and positioned such that the topmost cartridge is offset from the first plane.

A method for manufacturing a firearm magazine, the firearm magazine configured to store and feed cartridges of a first size into a firearm originally configured to fire cartridges of a second larger size, said firearm comprising:

• one of a bolt or a slide movable between an open and a closed position, the method comprising:
• forming an asymmetrical elongated housing with a proximal end and a distal end;
• affixing a first plate at the proximal end;
• positioning a follower in the asymmetrical elongated housing;
• positioning a follower spring between the follower and the first plate;
• forming feedlips at the distal end of the asymmetrical elongated housing, wherein the feedlips are adapted to hold a topmost cartridge of a plurality of cartridges within the firearm magazine until the topmost cartridge is fed into a chamber of the firearm, and wherein a centerline of the bolt or slide of the firearm is in a first plane, and wherein one or more of the feedlips and the asymmetrical elongated housing are shaped such that a centerline of the topmost cartridge is offset from the first plane.