# US 11,306,995 B2 · Shotgun configuration

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- Number: US 11,306,995 B2
- Document ID: US11306995B2
- Status: Granted
- Kind: B2
- Application number: 16/924,530
- Filed: 2020-07-09
- Published: 2021-02-11
- Granted: 2022-04-19
- Earliest claimed: 2019-08-06
- Assignees: Smith & Wesson Corp.
- Applicants: Smith & Wesson Inc.
- Inventors: Simon M. Muska
- Web page: https://patentgrep.com/patent/US11306995B2

## CPC

- F41C 7/02: Pump-action guns, i.e. guns having a reciprocating handgrip beneath the barrel for loading or cocking
- F41A 3/66: Breech housings or frames; Receivers
- F41A 9/55: Fixed {or movable} guiding means, mounted on, or near, the cartridge chamber
- F41A 9/72: Tubular magazines, i.e. magazines containing the ammunition in lengthwise tandem sequence
- F41A 17/34: Magazine safeties
- F41C: SMALLARMS, e.g. PISTOLS, RIFLES (functional features or details common to both smallarms and ordnance, mountings therefor F41A; projecting missiles without use of explosive or combustible propellant charge F41B); ACCESSORIES THEREFOR
- F41A: FUNCTIONAL FEATURES OR DETAILS COMMON TO BOTH SMALLARMS AND ORDNANCE, e.g. CANNONS; MOUNTINGS FOR SMALLARMS OR ORDNANCE

## Abstract

A shotgun is formed of sub-assemblies which include a lower receiver upon which a butt stock and an upper receiver are mounted. The lower receiver houses the fire control mechanism, the butt stock includes an ammunition elevator and a breech cover. Magazine tubes, ammunition cut-offs, a selector, a selector interrupter and the barrel are mounted on the upper receiver.

## Claims

### Claim 1

A firearm comprising a plurality of sub-assemblies, said plurality of sub-assemblies comprising:
a lower receiver;
an upper receiver mounted on said lower receiver;
a butt stock mounted on said lower receiver;
an ammunition elevator mounted on said butt stock;
a cover positioned between said butt stock and said lower receiver.

### Claim 2 (depends on 1)

The firearm according to claim 1, further comprising:
a pair of tabs mounted on said upper receiver;
a pair of notches mounted on said lower receiver, each said notch receiving one of said tabs when said upper receiver is mounted on said lower receiver;
a first lug mounted on said upper receiver, said first lug defining a first hole therethrough;
a second lug mounted on said lower receiver, said second lug defining a second hole therethrough, said first and second lugs engaging one another and receiving a pin extending between said first and second holes to secure said upper and lower receivers to one another.

### Claim 3 (depends on 1)

The firearm according to claim 1, wherein said butt stock is movably mounted on said lower receiver.

### Claim 4 (depends on 3)

The firearm according to claim 3, further comprising:
a guide rail extending from said lower receiver;
a cavity positioned in said butt stock, said cavity receiving said guide rail and guiding motion of said butt stock relatively to said lower receiver.

### Claim 5 (depends on 4)

The firearm according to claim 4, wherein said cover is mounted on said butt stock and movable therewith between a closed position overlying a breech end of said barrel, and an open position exposing a breech end of said barrel.

### Claim 6 (depends on 1)

The firearm according to claim 1, further comprising:
a barrel mounted on said upper receiver;
first and second magazines mounted on said upper receiver adjacent to said barrel, said first and second magazines comprising tube magazines;
a fore-end mounted on said upper receiver and slidably movable along said barrel;
a fire control mechanism positioned within said lower receiver.

### Claim 7 (depends on 6)

The firearm according to claim 6, further comprising:
a first magazine cut-off mounted on said upper receiver, said first magazine cut-off comprising a first blocking surface movable relatively to said first magazine for controlling release of ammunition therefrom;
a second magazine cut-off mounted on said upper receiver, said second magazine cut-off comprising a second blocking surface movable relatively to said second magazine for controlling release of ammunition therefrom.

### Claim 8 (depends on 7)

The firearm according to claim 7, further comprising a third magazine cut-off mounted on said upper receiver, said third magazine cut-off comprising third and fourth blocking surfaces movable relatively to said first and second magazines for controlling release of ammunition therefrom.

### Claim 9 (depends on 8)

The firearm according to claim 8, wherein said first magazine cut-off is mounted on said first magazine, said second magazine cut-off is mounted on said second magazine, and said third magazine cut-off is mounted on said first and second magazines.

### Claim 10 (depends on 7)

The firearm according to claim 7, wherein, said fore-end comprises a chassis, a selector being mounted on said chassis, said selector having a selector surface movable relatively to said chassis between a first position, wherein upon motion of said fore-end, said selector surface is engageable with said first magazine cut-off to release ammunition from said first magazine, and a second position wherein, upon motion of said fore-end, said selector surface is engageable with said second magazine cut-off to release ammunition from said second magazine.

### Claim 11 (depends on 10)

The firearm according to claim 10, further comprising an interrupter mounted on said upper receiver, said interrupter comprising:
an interrupter surface extending lengthwise along said upper receiver;
a boss projecting from said selector, said boss engaging said interrupter surface and thereby preventing motion of said selector unless said fore-end is positioned in a foremost position relatively to said barrel.

### Claim 12 (depends on 11)

The firearm according to claim 11, wherein said interrupter surface is mounted between said first and second magazines.

### Claim 13 (depends on 8)

The firearm according to claim 8, wherein said fore-end comprises a chassis having an actuator mounted thereon, said actuator being engageable with said third magazine cut-off upon motion of said fore-end.

### Claim 14 (depends on 6)

The firearm according to claim 6, wherein said firearm comprises a shotgun.

### Claim 15

A shotgun comprising a plurality of sub-assemblies, said plurality of sub-assemblies comprising:
an upper receiver including a barrel, at least a first magazine attached to said barrel and a fore-end slidably movable along said barrel;
a lower receiver including a fire control mechanism, said upper receiver being mounted on said lower receiver;
a butt stock mounted on said lower receiver;
an ammunition elevator mounted on said butt stock;
a cover positioned between said butt stock and said lower receiver.

### Claim 16 (depends on 15)

The shotgun according to claim 15, further comprising:
a pair of tabs mounted on said upper receiver;
a pair of notches mounted on said lower receiver, each said notch receiving one of said tabs when said upper receiver is mounted on said lower receiver;
a first lug mounted on said upper receiver, said first lug defining a first hole therethrough;
a second lug mounted on said lower receiver, said second lug defining a second hole therethrough, said first and second lugs engaging one another and receiving a pin extending between said first and second holes to secure said upper and lower receivers to one another.

### Claim 17 (depends on 15)

The shotgun according to claim 15, wherein said butt stock is movably mounted on said lower receiver.

### Claim 18 (depends on 17)

The shotgun according to claim 17, further comprising:
a guide rail extending from said lower receiver;
a cavity positioned in said butt stock, said cavity receiving said guide rail and guiding motion of said butt stock relatively to said lower receiver.

### Claim 19 (depends on 18)

The shotgun according to claim 18, wherein said cover is mounted on said butt stock and movable therewith between a closed position overlying a breech end of said barrel, and an open position exposing a breech end of said barrel.

### Claim 20 (depends on 15)

The shotgun according to claim 15, further comprising a second magazine mounted on said upper receiver, said first and second magazines comprising tube magazines.

### Claim 21 (depends on 18)

The shotgun according to claim 18, further comprising:
a first magazine cut-off mounted on said upper receiver, said first magazine cut-off comprising a first blocking surface movable relatively to said first magazine for controlling release of ammunition therefrom;
a second magazine cut-off mounted on said upper receiver, said second magazine cut-off comprising a second blocking surface movable relatively to said second magazine for controlling release of ammunition therefrom.

### Claim 22 (depends on 21)

The shotgun according to claim 21, further comprising a third magazine cut-off mounted on said upper receiver, said third magazine cut-off comprising third and fourth blocking surfaces movable relatively to said first and second magazines for controlling release of ammunition therefrom.

### Claim 23 (depends on 22)

The shotgun according to claim 22, wherein said first magazine cut-off is mounted on said first magazine, said second magazine cut-off is mounted on said second magazine, and said third magazine cut-off is mounted on said first and second magazines.

### Claim 24 (depends on 21)

The shotgun according to claim 21, wherein, said fore-end comprises a chassis, a selector being mounted on said chassis, said selector having a selector surface movable relatively to said chassis between a first position, wherein upon motion of said fore-end, said selector surface is engageable said first magazine cut-off to release ammunition from said first magazine, and a second position wherein, upon motion of said fore-end, said selector surface is engageable with said second magazine cut-off to release ammunition from said second magazine.

### Claim 25 (depends on 24)

The shotgun according to claim 24, further comprising an interrupter mounted on said upper receiver, said interrupter comprising:
an interrupter surface extending lengthwise along said upper receiver;
a boss projecting from said selector, said boss engaging said interrupter surface and thereby preventing motion of said selector unless said fore-end is positioned in a foremost position relatively to said barrel.

### Claim 26 (depends on 25)

The shotgun according to claim 25, wherein said interrupter surface is mounted between said first and second magazines.

### Claim 27 (depends on 22)

The shotgun according to claim 22, wherein said fore-end comprises a chassis having an actuator mounted thereon, said actuator being engageable with said third magazine cut-off upon motion of said fore-end.