Cartridge magazine with shoulder retention features

Abstract

A magazine configured to receive a plurality of cartridges includes a front portion, a rear portion, and opposing lateral portions between the front portion and the rear portion, the opposing lateral portions including a neck portion, a shoulder portion adjacent the neck portion, and a base portion adjacent the shoulder portion, wherein the neck portion adjacent the shoulder portion has a width that is about 0.005 inches to about 0.04 inches greater than the nominal size of a neck portion of the cartridges.

1 . A magazine configured to receive a plurality of cartridges, comprising:
 a front portion;   a rear portion; and   opposing lateral portions between the front portion and the rear portion; the opposing lateral portions including a neck portion, a shoulder portion adjacent the neck portion, and a base portion adjacent the shoulder portion, wherein a width of the neck portion adjacent the shoulder portion has a width that is about 0.005 inches to about 0.04 inches greater than the nominal size of a neck portion of the cartridges.   
   
   
       2 . The magazine of  claim 1 , wherein the neck portion adjacent the shoulder portion has a width that is approximately 0.01 inches to about 0.025 inches greater than the nominal size of the neck portion of the cartridges. 
   
   
       3 . The magazine of  claim 1 , further comprising a base plate on a bottom portion of the magazine; and a follower and a biasing member operatively associated with the base plate. 
   
   
       4 . The magazine of  claim 1 , wherein the magazine is configured as a detachable magazine. 
   
   
       5 . The magazine of  claim 1 , further comprising lips extending inwardly and upwardly from the opposing lateral portions. 
   
   
       6 . The magazine of  claim 1 , further comprising a scalloped recess defined in the front portion. 
   
   
       7 . A detachable magazine configured to receive a plurality of cartridges, the detachable magazine comprising:
 a rounded front portion;   a rear portion; and   opposing lateral portions between the front portion and the rear portion having a profile similar to the profile of the cartridge; the opposing lateral portions including a neck portion, a shoulder portion adjacent the neck portion, and a base portion adjacent the shoulder portion, wherein the neck portion adjacent the shoulder portion has a width that is about 0.005 inches to about 0.04 inches greater than the nominal size of a neck portion of the cartridges.   
   
   
       8 . The magazine of  claim 7 , wherein the neck portion adjacent the shoulder portion has a width that is approximately 0.01 inches to about 0.025 inches greater than the nominal size of the neck portion of the cartridges. 
   
   
       9 . The magazine of  claim 1 , further comprising lips extending inwardly and upwardly from the opposing lateral portions. 
   
   
       10 . The magazine of  claim 1 , further comprising a scalloped recess defined in the front portion. 
   
   
       11 . A firearm, comprising:
 a stock having a fore-end and a butt-end;   a magazine operatively associated with the stock and being configured to receive a plurality of cartridges, the magazine including a front portion, a rear portion, and opposing lateral portions between the front portion and the rear portion; the opposing lateral portions including a neck portion, a shoulder portion adjacent the neck portion, and a base portion adjacent the shoulder portion, wherein the neck portion adjacent the shoulder portion has a width that is about 0.005 inches to about 0.04 inches greater than the nominal size of a neck portion of the cartridges.   
   
   
       12 . The magazine of  claim 11 , wherein the neck portion adjacent the shoulder portion has a width that is approximately 0.01 inches to about 0.025 inches greater than the nominal size of the neck portion of the cartridges. 
   
   
       13 . The magazine of  claim 1 , further comprising a base plate on a bottom portion of the magazine; and a follower and a biasing member operatively associated with the base plate. 
   
   
       14 . The magazine of  claim 11 , wherein the magazine is configured as a detachable magazine. 
   
   
       15 . The magazine of  claim 11 , further comprising lips extending inwardly and upwardly from the opposing lateral portions. 
   
   
       16 . The magazine of  claim 11 , further comprising a scalloped recess defined in the front portion.