# US 9,435,596 B2 · Systems and methods for retaining an extractor pin in a bolt carrier group of a firearm

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- Number: US 9,435,596 B2
- Document ID: US9435596B2
- Status: Granted
- Kind: B2
- Application number: 14/952,100
- Filed: 2015-11-25
- Published: 2016-06-23
- Granted: 2016-09-06
- Earliest claimed: 2014-12-18
- Assignees: Daniel Defense, Inc.
- Applicants: Daniel Defense, Inc.
- Inventors: Marvin C. Daniel; Clinton Wade Lynch
- Web page: https://patentgrep.com/patent/US9435596B2

## CPC

- F41A 15/14: the ejector being mounted on or within the bolt; {Extractors per se}
- F41A 3/16: the locking elements effecting a rotary movement about the barrel axis, e.g. rotating cylinder bolt locks
- F41A 3/26: semi-automatically or automatically operated, e.g. having a slidable bolt-carrier and a rotatable bolt
- F41A 3/30: Interlocking means, e.g. locking lugs, screw threads
- F41A: FUNCTIONAL FEATURES OR DETAILS COMMON TO BOTH SMALLARMS AND ORDNANCE, e.g. CANNONS; MOUNTINGS FOR SMALLARMS OR ORDNANCE

## Abstract

A bolt carrier group of a firearm is disclosed. The bolt carrier group may include a bolt comprising a passage, an extractor comprising a hole, and an extractor pin comprising an elongated circular body positioned within the passage and the hole to pivotably attach the extractor to the bolt. The extractor pin may include a transverse tab extending from one end of the elongated circular body.

## Claims

### Claim 1

A bolt carrier group of a firearm, comprising:
a bolt carrier;
a bolt comprising a passage;
an extractor comprising a hole; and
an extractor pin comprising an elongated circular body positioned within the passage and the hole to pivotably attach the extractor to the bolt, wherein the extractor pin comprises a transverse tab extending from one end of the elongated circular body.

### Claim 2 (depends on 1)

The bolt carrier group of claim 1, wherein an outer surface of the bolt comprises a slot that corresponds to the tab.

### Claim 3 (depends on 2)

The bolt carrier group of claim 2, wherein the tab nests within the slot.

### Claim 4 (depends on 3)

The bolt carrier group of claim 3, wherein when the bolt is positioned within the bolt carrier, the bolt carrier at least partially surrounds the tab and slot to retain the tab within the slot.

### Claim 5 (depends on 4)

The bolt carrier group of claim 4, wherein the bolt must be removed from the bolt carrier to remove the extractor pin.

### Claim 6 (depends on 2)

The bolt carrier group of claim 2, wherein the slot extends rearward from the passage.

### Claim 7 (depends on 2)

The bolt carrier group of claim 2, wherein the slot extends parallel to an axial axis of the bolt.

### Claim 8

A retention assembly for a bolt carrier group of a firearm, the retention assembly comprising:
a bolt comprising a passage;
an extractor comprising a hole; and
an extractor pin comprising an elongated circular body positioned within the passage and the hole to pivotably attach the extractor to the bolt, wherein the extractor pin comprises a transverse tab extending from one end of the elongated circular body.

### Claim 9 (depends on 8)

The assembly of claim 8, wherein an outer surface of the bolt comprises a slot that corresponds to the tab.

### Claim 10 (depends on 9)

The assembly of claim 9, wherein the tab nests within the slot.

### Claim 11 (depends on 10)

The assembly of claim 10, further comprising a bolt carrier, wherein when the bolt is positioned within the bolt carrier, the bolt carrier at least partially surrounds the tab and slot to retain the tab within the slot.

### Claim 12 (depends on 11)

The assembly of claim 11, wherein the bolt must be removed from the bolt carrier to remove the extractor pin.

### Claim 13 (depends on 9)

The assembly of claim 9, wherein the slot extends rearward from the passage.

### Claim 14 (depends on 9)

The assembly of claim 9, wherein the slot extends parallel to an axial axis of the bolt.

### Claim 15

A method for retaining an extractor pin in place in a bolt carrier group of a firearm, the method comprising:
providing a bolt carrier;
providing a bolt comprising a passage, wherein an outer surface of the bolt comprises a slot;
providing an extractor comprising a hole;
positioning an extractor pin comprising an elongated circular body within the passage and the hole to pivotably attach the extractor to the bolt, wherein the extractor pin comprises a transverse tab extending from one end of the elongated circular body; and
positioning the tab within the slot.

### Claim 16 (depends on 15)

The method of claim 15, wherein the slot corresponds to the tab.

### Claim 17 (depends on 16)

The method of claim 16, wherein the tab nests within the slot.

### Claim 18 (depends on 17)

The method of claim 17, further comprising positioning the bolt within the bolt carrier, wherein the bolt carrier at least partially surrounds the tab and slot to retain the tab within the slot.

### Claim 19 (depends on 18)

The method of claim 18, further comprising removing the bolt from the bolt carrier to remove the extractor pin.

### Claim 20 (depends on 16)

The method of claim 16, wherein the slot extends rearward from the passage parallel to an axial axis of the bolt.