Ammunition magazine with asymmetric feeding
This disclosure describes systems, methods, and apparatus for a magazine assembly for a firearm, the magazine assembly comprising: an elongated housing, a spring positioned in an interior of the housing, a first and second plate at a proximal end of the housing, at least one follower configured to support one or more cartridges and move or slide within the housing based on a compression and decompression of the spring, one or more feed lips positioned at a distal end of the housing, the one or more feed lips adapted to prevent upward movement of a topmost of the one or more cartridges until a bolt or slide chambers the topmost of the one or more cartridges, and wherein the topmost cartridge is arranged off-center from the bolt of the firearm so as to increase an engagement or overlap between the bolt and the topmost cartridge.
1 . A magazine assembly for a firearm, the magazine assembly comprising:
an elongated housing comprising a proximal portion toward a proximal end and a distal portion toward a distal end, wherein the distal portion is configured to be inserted within and to engage with a magazine well of a firearm and wherein the proximal portion is narrower than the proximal portion;
a first plane bisecting the distal portion;
a second plane bisecting the proximal portion and passing through a centerline of a topmost cartridge, wherein the first and second planes are parallel but offset from each other;
a spring positioned in an interior of the elongated housing;
at least one follower configured to move within the elongated housing based in part on a compression and decompression of the spring, and wherein the at least one follower is configured to support one or more cartridges;
one or more feedlips positioned at the distal end of the elongated housing; and
wherein the centerline of the topmost cartridge is in a second plane that is parallel to and laterally offset from the first plane.
2 . The magazine assembly of claim 1 , wherein the first and second planes are configured to be parallel to a longitudinal axis of the firearm.
3 . The magazine assembly of claim 2 , wherein the distal and proximal portions are asymmetric.
4 . The magazine assembly of claim 1 , wherein the one or more feedlips comprise a pair of feedlips that are asymmetric with respect to the distal portion and are thereby configured to force the topmost cartridge to be offset from the bolt or slide of the firearm.
5 . The magazine assembly of claim 4 , wherein the pair of feedlips comprises first and second feedlips having different heights with respect to the distal end of the elongated housing.
6 . The magazine assembly of claim 5 , wherein at least one of a length, curvature, rigidity, or elasticity of the first feedlip is different from that of the second feedlip.
7 . The magazine assembly of claim 1 , wherein the magazine assembly is configured to store and feed cartridges of a first size and a second larger size.
8 . The magazine assembly of claim 1 , wherein a remainder of the one or more cartridges below the topmost cartridge are arranged in one of a single stack, dual stack, or staggered configuration.
9 . The magazine assembly of claim 1 , further comprising:
at least one mag stop configured to interact with the magazine well of the firearm, and wherein a position of the at least one mag stop between the proximal and distal ends is configured to enhance engagement or overlap between a bolt or slide of the firearm and the topmost cartridge.
10 . The magazine assembly of claim 1 , wherein the magazine comprises cartridges of a different size than cartridges that a receiver of the firearm is configured to operate with.
11 . 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.
12 . The firearm of claim 11 , wherein the magazine is configured to store and feed cartridges of a second size into the firearm, the second size different from the first size.
13 . The firearm of claim 11 , wherein a centerline of the magazine well coincides with the centerline of the bolt or slide, and wherein the centerline of the topmost cartridge is misaligned with respect to the centerline of the bolt or slide.
14 . The firearm of claim 11 , wherein the feedlips comprise a first feedlip and a second feedlip arranged on opposing sides of the elongated housing, and wherein the first and second feedlips are asymmetric with respect to the elongated housing and are shaped and positioned to force the topmost cartridge to be off-center from the bolt or slide of the firearm.
15 . The firearm of claim 14 , wherein at least one of a length, curvature, rigidity, or elasticity of the first feedlip is different from that of the second feedlip.
16 . The firearm of claim 14 , wherein the first feedlip and the second feedlip are positioned at different heights with respect to the proximal end of the elongated housing.
17 . The firearm of claim 11 , wherein first and second longitudinal surfaces of the topmost cartridge are at distinct distances from a respective first and second longitudinal surface of the bolt or slide.
18 . The firearm of claim 11 , wherein the topmost cartridge is in a single stack configuration.
19 . 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.