# US 11,029,106 B2 · Recoil system for use in some types of rifles

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- Number: US 11,029,106 B2
- Document ID: US11029106B2
- Status: Granted
- Kind: B2
- Application number: 16/579,820
- Filed: 2019-09-23
- Published: 2020-05-21
- Granted: 2021-06-08
- Earliest claimed: 2016-09-15
- Applicants: Zachary Law
- Inventors: Zachary Law
- Web page: https://patentgrep.com/patent/US11029106B2

## CPC

- F41A 3/82: Coil spring buffers (F41A3/80 takes precedence)
- F41C 23/04: Folding or telescopic stocks or stock parts (articulated or collapsible guns F41A11/04)
- F41A: FUNCTIONAL FEATURES OR DETAILS COMMON TO BOTH SMALLARMS AND ORDNANCE, e.g. CANNONS; MOUNTINGS FOR SMALLARMS OR ORDNANCE
- 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

## Abstract

The present device is a shortened recoil system designed to replace the AR-15 type recoil system, comprising the standard recoil systems of many commonly used rifles including the AR-10, AR-15, M-16 and M-4. This shortened recoil system removes or replaces the parts of the traditional recoil system located in the stocks of these rifles and place the entire recoil system within the receiver, while maintaining the alignment of the recoil system with the barrel of the rifle. A major advantage of the present system is that it allows the rifle to be fired with a folded stock or even with no stock at all, as no part of the present recoil system is located within the stock.

## Claims

### Claim 1

A shortened recoil system comprising:
a bolt carrier, which is configured for use in a direct impingement system, wherein the bolt carrier comprises one or more guide rod channels located in the same horizontal plane as the bolt carrier;
one or more guide rods configured to fit within the guide rod channel;
one or more recoil springs through which a guide rod can be threaded; and
a rear plate configured to hold one or more guide rods in a selected position.

### Claim 2 (depends on 1)

The shortened recoil system as described in claim 1 wherein the one or more guide rod channels comprise a guide rod hole of sufficient size to allow a guide rod to pass through the guide rod hole.

### Claim 3 (depends on 1)

The shortened recoil system as described in claim 1 wherein the one or more guide rods comprise a first end which is capped.

### Claim 4 (depends on 1)

The shortened recoil system as described in claim 1 wherein the one or more guide rods comprise a second end comprising a slot.

### Claim 5 (depends on 1)

The shortened recoil system as described in claim 1 wherein the rear plate comprises rear plate slots.

### Claim 6 (depends on 1)

The shortened recoil system as described in claim 1 wherein the bolt carrier comprises a gas key.

### Claim 7 (depends on 1)

The shortened recoil system as described in claim 1 wherein the bolt carrier comprises a strike face.

### Claim 8 (depends on 1)

The shortened recoil system as described in claim 1 wherein the rear plate and the one or more guide rods are irremovably connected.

### Claim 9

A method for using a shortened recoil system comprising:
providing a bolt carrier, which is configured for use in a direct impingement system, wherein the bolt carrier comprises one or more guide rod channels located in the same horizontal plane as the bolt carrier; one or more guide rods configured to fit within the guide rod channel; one or more recoil springs through which a guide rod can be threaded; and a rear plate configured to hold one or more guide rods in a selected position;
providing a rifle comprising an AR-15 rifle comprising a standard bolt carrier system;
removing the standard bolt carrier system from the AR-15 rifle;
installing the shortened recoil system in the AR-15 rifle; and
operating the AR-15 rifle.