Patent ID: 8061071

Claim:
An ammunition magazine comprising: a. A magazine casing, further comprised of: i. a lower storage section with a rectangular cross-sectional area, having two longer sides and two shorter sides; ii. an upper feed section with a rectangular cross-sectional area, likewise having two longer sides and two shorter sides corresponding to the longer and shorter sides of the lower storage section and the cross-sectional area of the upper feed section being smaller than that of the lower storage section; and iii. a medial transitional area with a variable and asymmetrical cross-sectional area gradually decreasing from the cross-sectional area of the storage section to the cross-sectional area of the feed section, the shorter sides of the lower storage section and the upper feed sections defining shorter sides of the magazine casing and one of the shorter sides of the casing being defined as a spine; b. a floor plate, capable of interface about an orifice of the storage section; c. a locking plate, residing internal of the orifice of the storage section further comprising an interface tab, projecting from an obverse side in a manner to interface with the floor plate and a partition extending from a reverse side of the lock plate into an interior of the storage section of the casing; d. a follower spring; e. a spring guide positioned on the spring in a manner to interface with the spine of the magazine and assist progression of the spring through the magazine; and f. a follower having a slit such that it is capable of straddling the partition.