Magazine well funnel assembly

Abstract

A magazine well funnel assembly is an integrated design including a mainspring housing portion and a funnel well portion attached to a firearm. The magazine well funnel assembly includes a set of funnel walls arranged to form an aperture shaped to accept a magazine and is bounded by a funnel rim on a side of the set of funnel walls opposite a plane of the aperture. The funnel rim is shaped in an arc on a side of the set of funnel walls adjacent to the rear funnel wall portion to increase the surface area of the funnel. A method of modification includes drilling a relocated pin hole in the firearm frame and inserting the magazine well funnel assembly therein. A base section of the firearm frame may be removed to preserve the same vertical length of the firearm compared to before the magazine well funnel assembly was installed.

1 . A magazine well funnel assembly comprising:
 a mainspring housing portion including a cavity for a mainspring;   a magazine well funnel portion being integrated with the mainspring housing portion and having a set of funnel walls, the set of funnel walls including a first lateral funnel wall portion, a second lateral funnel wall portion, a front funnel wall portion, and a rear funnel wall portion, the set of funnel walls being arranged to form an aperture shaped to accept a magazine;   the set of funnel walls further being bounded by funnel rim on a side of the set of funnel walls opposite the aperture, wherein the rear funnel wall portion forms a first angle with a plane of the aperture that is different than a second angle formed by the one or more of the first lateral funnel wall portion, the second funnel wall portion, and the front funnel wall portion with the plane of the aperture;   
     
     
         2 . The magazine well funnel assembly of  claim 1 , wherein the first angle is less than the second angle. 
     
     
         3 . The magazine well funnel assembly of  claim 1 , wherein the first lateral funnel wall portion and the second lateral funnel wall portion each form the second angle with the plane of the aperture. 
     
     
         4 . The magazine well funnel assembly of  claim 1 , wherein the funnel rim has a width substantially equal to or less than 0.18 inches around an entire perimeter of the funnel rim. 
     
     
         5 . The magazine well funnel assembly of  claim 1 , one or more of the funnel walls in the set of the funnel walls has a substantially flat upper portion adjacent to the funnel rim and a sloping lower portion adjacent to the aperture. 
     
     
         6 . The magazine well funnel assembly of  claim 3 , wherein a boundary between the rear funnel wallet portion and the funnel rim is in the shape of an arc of greater than  115  degrees and a radius equal to or greater than 0.295 inches. 
     
     
         7 . The magazine well funnel assembly of  claim 1 , wherein the magazine well funnel assembly is configured to insert into a modified firearm frame, the modified firearm frame being modified to have a shortened vertical length such that the vertical length of the combination of the modified firearm frame and inserted magazine well funnel assembly is substantially equal to an unmodified firearm frame. 
     
     
         8 . The magazine well funnel assembly of  claim 1 , wherein the funnel rim includes a recessed magazine lip support disposed adjacent to a magazine lip access notch in the magazine well funnel assembly. 
     
     
         9 . A firearm comprising:
 a frame configured to accept a magazine;   a magazine well funnel assembly attached to the frame and also configured to accept the magazine, the magazine well funnel assembly including a mainspring housing portion integrated with a magazine funnel well portion, the magazine funnel well portion having a set of funnel walls, the set of funnel walls including at least a rear funnel wall portion;   the set of funnel walls being arranged to form an aperture to accept the magazine; and   the set of funnel walls further being bounded by a funnel rim on a side of the set of funnel walls opposite the aperture, the funnel rim being formed in the shape of an arc at a boundary between the funnel rim and the rear funnel wall portion, the arc having a shape of greater than 115 degrees and a radius equal to or greater than 0.25 inches.   
     
     
         10 . The firearm of  claim 9 , wherein the funnel rim includes a recessed magazine lip support surface disposed adjacent to a magazine lip access notch in the magazine well funnel assembly. 
     
     
         11 . The firearm of  claim 9 , wherein the magazine lip access notch is substantially 0.055 inches deep with respect to the outer surface of the magazine well funnel assembly. 
     
     
         12 . The firearm of  claim 9 , wherein the magazine lip access notch is substantially 0.366 inches wide. 
     
     
         13 . The firearm of  claim 9 , wherein the plane of the magazine lip support surface is substantially 0.070 inches below the funnel rim. 
     
     
         14 . The firearm of  claim 9 , wherein the set of funnel walls further includes a first lateral funnel wall portion, a second lateral funnel wall portion, and a rear funnel wall portion, wherein the rear funnel wall portions forms a first angle with a plane of the aperture that is different than a second angle formed by one or more of the first lateral funnel wall portion, the second lateral funnel wall portion, and the front funnel wall portion with the plane of the aperture. 
     
     
         15 . (canceled) 
     
     
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         17 . (canceled) 
     
     
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         20 . (canceled)