# US 11,079,190 B2 · Firearms recoil spring insert and recoil spring insert assembly

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- Number: US 11,079,190 B2
- Document ID: US11079190B2
- Status: Granted
- Kind: B2
- Application number: 15/790,874
- Filed: 2017-10-23
- Published: 2018-06-14
- Granted: 2021-08-03
- Earliest claimed: 2016-10-24
- Assignees: Daniel Defense, Inc.
- Applicants: Daniel Defense LLC
- Inventors: Billie Cyril Hudson, III; Lauren Hudson; Kevin Michael Blanford
- Web page: https://patentgrep.com/patent/US11079190B2

## CPC

- F41A 3/86: mounted under {or above} the barrel
- F41A 3/66: Breech housings or frames; Receivers
- F41A: FUNCTIONAL FEATURES OR DETAILS COMMON TO BOTH SMALLARMS AND ORDNANCE, e.g. CANNONS; MOUNTINGS FOR SMALLARMS OR ORDNANCE

## Abstract

A recoil spring assembly for a firearm provides a spring insert with an end piece. The end piece interacts with other components of the firearm to selectively secure the recoil spring in position. This allows the recoil spring to be selectively retained in the firearm when disassembling and reassembling the firearm.

## Claims

### Claim 1

A firearm comprising:
a recoil spring comprising coils forming a tunnel;
a recoil spring insert disposed in the tunnel, the recoil spring insert comprising:
a main body that fits inside the tunnel, the main body having a proximate end, wherein the main body defines a horizontal axis; and
an end piece on the proximate end of the main body, the end piece comprising an extended portion connected to and extending above the end such that the extended portion extends perpendicular to and above the horizontal axis; and
a grip insert comprising a surface shaped to form a slot extending perpendicular to and above the horizontal axis, wherein the slot is configured to receive and secure the extended portion of the end piece of the recoil spring insert.

### Claim 2 (depends on 1)

The firearm of claim 1, further comprising a grip comprising a bore.

### Claim 3 (depends on 2)

The firearm of claim 2, wherein the grip insert comprises a bore.

### Claim 4 (depends on 3)

The firearm of claim 3, further comprising a pin configured to extend through the bore of the grip and the bore of the grip insert.

### Claim 5 (depends on 4)

The firearm of claim 4, wherein the extended portion is configured to disengage with the slot when (i) the pin is removed from the bore of the grip and the bore of the grip insert and (ii) the grip insert is rotated to release the extended portion from the slot.