# US 2015/0090106 A1 · Last round link feed system

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- Number: US 2015/0090106 A1
- Document ID: US20150090106A1
- Status: Published application
- Kind: A1
- Application number: 14/474,704
- Filed: 2014-09-02
- Published: 2015-04-02
- Earliest claimed: 2011-03-09
- Assignees: Beta Corporation
- Applicants: The Beta Company
- Inventors: HUGH KENTON SEELEY; SILVIA KAISER-BLOCK; JOHN BRADEN; LLOYD MCGARRETT STILLS
- Web page: https://patentgrep.com/patent/US20150090106A1

## CPC

- F41A 9/71: Arrangements thereon for varying capacity; Adapters or inserts for changing cartridge size or type
- F41A 9/26: using a revolving drum magazine
- F41A 9/64: for unbelted ammunition
- F41A 9/68: Plural magazines, e.g. tandem magazines {; Arrangements of cartridges in two or more independent rows or channels which are selectively or sequentially brought into operative position}
- F41A 9/70: Arrangements thereon for discharging, e.g. cartridge followers or discharge throats
- F41A 9/75: having a spiral cartridge channel
- F41A 11/02: Modular concepts, e.g. weapon-family concepts
- Y10T 29/49826: Assembling or joining
- F41A: FUNCTIONAL FEATURES OR DETAILS COMMON TO BOTH SMALLARMS AND ORDNANCE, e.g. CANNONS; MOUNTINGS FOR SMALLARMS OR ORDNANCE
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

A modified elongate ammunition magazine, the magazine being modified by modifying an elongate, single plane magazine by removing its end cap so as to provide an elongate modified magazine having an upper end for attaching to said magazine well of a firearm, a lower end, and a through passageway therebetween, and a clip leg base attached thereto and also attachable to a high capacity ammunition magazine housing, the clip leg base configured such that when it is attached to said modified magazine to construct a feed clip assembly, and when the clip leg base is also attached to a high capacity magazine, and when the upper end of the modified magazine is installed into a firearm, an ammunition passageway is defined from an ammunition outlet of a high capacity ammunition magazine housing, through the modified magazine, and to a firearm. Also provided is a last linked assembly including a loose or spreadable link.

## Claims

### Claim 1

A last linked assembly and clear spacer cartridge combination for use with a firearm using a firearm having a magazine well, and for use with a high capacity ammunition magazine housing having an ammunition outlet, and for use with a feed clip assembly having a double stack portion tapering to a single stack exit location, said last linked assembly and clear spacer cartridge combination comprising the following components:
A) a first dummy cartridge;
B) a second dummy cartridge;
C) a “loose” link for holding said first and second dummy cartridges together, said first and second dummy cartridges and said link comprising said last linked assembly; and
D) a “spreader” spacer cartridge configured to move along with said first and second dummy cartridges in a double stacked configuration through said double stack portion of said feed clip assembly, and configured to spread apart said first and second dummy cartridges within the tolerances of said “loose” link, to allow the last linked assembly to compress into the narrower channel caused by the taper of the feed clip assembly and push the last live round up to be chambered.

### Claim 2 (depends on 1)

The last linked assembly as claimed in claim 1, wherein said clear spacer cartridge comprises said “spreader” spacer cartridge.

### Claim 3

A last linked assembly and clear spacer cartridge combination for use with a firearm using a firearm having a magazine well, and for use with a high capacity ammunition magazine housing having an ammunition outlet for dispensing at least one live ammunition cartridge, and for use with a feed clip assembly having a double stack passageway portion tapering to a single stack exit location, said feed clip assembly configured to provide a passageway from said high capacity ammunition magazine housing to said firearm proximate said magazine well, said last linked assembly and clear spacer cartridge combination comprising the following components:
A) a leading linked dummy cartridge;
B) a trailing linked dummy cartridge;
C) a spreadable link for linking said leading and trailing linked dummy cartridges together while allowing them freedom to move between a more spaced apart relationship and a less spaced apart relationship, said leading and trailing linked dummy cartridges and said link comprising a last linked assembly; and
D) a spacer cartridge configured to move along with leading and trailing linked dummy cartridges in a double stacked configuration through said double stack passageway portion of said feed clip assembly while said leading and trailing linked dummy cartridges are in one side of the double stack and said spacer cartridge is on the other side of the double stack, said spacer cartridge also configured to bias against said first and second dummy cartridges and spread them apart from their less spaced apart relationship position to their more spaced apart relationship as they approach said single stack exit location, to allow said leading linked dummy cartridge to push said at least one live ammunition cartridge out of said single stack exit location.

### Claim 4 (depends on 4)

The last linked assembly as claimed in claim 4, wherein said leading and trailing dummy cartridges are linked together by said loose link, and wherein said spacer cartridge is not linked to either of said leading and trailing dummy cartridges, and wherein said leading and trailing dummy cartridges and said spacer cartridge are all inert.

### Claim 5 (depends on 4)

The last linked assembly as claimed in claim 4, wherein said linked dummy rounds are each tapered front and rear and each includes a center portion having a reduced diameter, and wherein said linked dummy rounds are linked together by said link such that said link defines two openings each configured to loosely fit around a corresponding center portion of a corresponding dummy round.

### Claim 6 (depends on 5)

The last linked assembly as claimed in claim 5, wherein said link allows said linked dummy rounds to move apart by approximately half their diameters.

### Claim 7

A combination of feed elements for use with a firearm using a firearm having a magazine well, and for use with a high capacity ammunition magazine housing having an ammunition outlet for dispensing at least one live ammunition cartridge, and for use with a feed clip assembly having a double stack passageway portion and a tapering portion tapering to a single stack exit location, said feed clip assembly configured to provide a passageway from said high capacity ammunition magazine housing to said firearm proximate said magazine well, said combination of feed elements comprising the following components:
A) a leading linked dummy cartridge;
B) a trailing linked dummy cartridge;
C) a spreadable link for linking said leading and trailing linked dummy cartridges together while allowing them freedom to move between a more spaced apart relationship and a less spaced apart relationship, said leading and trailing linked dummy cartridges and said link comprising a last linked assembly; and
D) a spacer cartridge configured to move along with leading and trailing linked dummy cartridges in a double stacked configuration through said double stack passageway portion of said feed clip assembly while said leading and trailing linked dummy cartridges are in one side of the double stack and said spacer cartridge is on the other side of the double stack, said spacer cartridge also configured to bias against said first and second dummy cartridges and spread them apart from their less spaced apart relationship position to their more spaced apart relationship as they pass through said tapering portion of said feed clip assembly and approach said single stack exit location, to allow said leading linked dummy cartridge to push said at least one live ammunition cartridge out of said single stack exit location.

### Claim 8 (depends on 7)

The last linked assembly as claimed in claim 7, further comprising a loose inert cartridge in said other side of the double stack and trailing said spacer cartridge, configured to bias at least partially against said spacer cartridge as said spacer cartridge moves along with leading and trailing linked dummy cartridges.

### Claim 9 (depends on 8)

The last linked assembly as claimed in claim 8, wherein said loose inert cartridge is a first inert dummy cartridge, and further comprising a second inert dummy cartridge trailing said trailing linked dummy cartridge, said second inert dummy cartridge configured to bias at least partially against said trailing linked dummy cartridge as said spacer cartridge moves along with leading and trailing linked dummy cartridges.

### Claim 10 (depends on 7)

The last linked assembly and clear spacer cartridge combination as claimed in claim 7, wherein said combination can be used with at least one feed drum.

### Claim 11

A method of dispensing live ammunition from a high capacity ammunition magazine housing having an ammunition outlet to a firearm having a magazine well, said method including the following steps
A) providing the following:
1) a firearm with a magazine well;
2) a high capacity ammunition magazine housing having an ammunition outlet
3) a feed clip assembly having a double stack passageway portion as well as a tapering portion tapering to a single stack exit location, said feed clip assembly configured to fit in the well
4) a leading linked dummy cartridge;
5) a trailing linked dummy cartridge;
6) a spreadable link for linking said leading and trailing linked dummy cartridges together while allowing them freedom to move between a more spaced apart relationship and a less spaced apart relationship, said leading and trailing linked dummy cartridges and said link comprising a last linked assembly; and
7) a spacer cartridge configured to move along with leading and trailing linked dummy cartridges in a double stacked configuration through said double stack passageway portion of said feed clip assembly while said leading and trailing linked dummy cartridges are in one side of the double stack and said spacer cartridge is on the other side of the double stack, said spacer cartridge also configured to bias against said first and second dummy cartridges and spread them apart from their less spaced apart relationship position to their more spaced apart relationship as they approach said single stack exit location, to allow said leading linked dummy cartridge to push said at least one live ammunition cartridge out of said single stack exit location.
B) urging said last linked assembly and said spacer cartridge through said double stack passageway portion of said feed clip assembly while said leading and trailing linked dummy cartridges are in one side of the double stack and said spacer cartridge is on the other side of the double stack
C) urging said last linked assembly and said spacer cartridge through said tapering portion of said feed clip assembly such that said spacer cartridge biases against said first and second dummy cartridges and spreads them apart from their less spaced apart relationship position to their more spaced apart relationship as they approach said single stack exit location, and such that said leading linked dummy cartridge pushes said at least one live ammunition cartridge out of said single stack exit location.