Magazine well

Abstract

A magazine well formed in a lower receiver of a firearm is provided. The firearm may be a rifle and particularly a tactical rifle such as, but not limited to an AR-15. The magazine well accepts more than one type of magazine. Each type of magazine operates to hold a size of ammunition that differs from the other magazines. This allows users to shoot varying sized or caliber ammunition from the same firearm by simply changing the magazine that is loaded with varying size or caliber ammunition.

1 . A magazine well formed in a lower receiver, the magazine well comprising:
 a substantially flat rear surface; and   an inner volume extending through the magazine well, wherein the inner volume receives one of a first magazine or a second magazine wherein the first magazine is loaded with a first size ammunition and the second magazine is loaded with a second size ammunition, the second size ammunition is larger than the first size ammunition.   
     
     
         2 . The magazine well of  claim 1 , wherein the first magazine is a conventional double stack magazine. 
     
     
         3 . The magazine well of  claim 1 , wherein the first magazine comprises a protrusion extending along a length of the first magazine that corresponds to a channel of a prior art magazine well. 
     
     
         4 . The magazine well of  claim 3 , wherein the protrusion extending along the length of the first magazine engages the substantially flat rear surface when the first magazine is couple within the magazine well. 
     
     
         5 . The magazine well of  claim 1 , wherein the second magazine is a double stack magazine. 
     
     
         6 . The magazine well of  claim 5 , wherein the second magazine comprises a substantially flat rear surface. 
     
     
         7 . The magazine well of  claim 6 , wherein the substantially flat rear surface of the second magazine engages the substantially flat rear surface of the magazine well when the second magazine is coupled within the magazine well. 
     
     
         8 . A double stack magazine comprising:
 comprising a substantially flat rear surface; and   an outer dimension to couple within a magazine well configured to receive the double stack magazine or a conventional magazine, wherein the magazine is loaded with ammunition that is larger than the ammunition that is loaded within the conventional magazine.   
     
     
         9 . The magazine well of  claim 8 , wherein the substantially flat rear surface of the magazine engages a substantially flat rear surface of the magazine well when the magazine is coupled within the magazine well. 
     
     
         10 . A lower receiver and magazine system comprising:
 magazine well formed in the lower receiver, the magazine well comprising:
 a substantially flat rear surface; and 
 an inner volume extending through the magazine well; and 
   a double stack magazine loaded with ammunition that is larger than ammunition that is loaded within a conventional magazine, the double stack magazine comprising:
 a substantially flat rear surface; and 
 an outer dimension to couple within the inner volume of the magazine well, wherein the substantially flat rear surface of the magazine engages the substantially flat rear surface of the magazine well.