FIREARM

• US 20090031606A1
• Filed: 09/12/2008
• Published: 02/05/2009
• Est. Priority Date: 02/13/2004
• Status: Active Grant

• Current Assignee: RMDI, LLC
• Original Assignee: RMDI, LLC
• Inventors: Nebeker, Darin G., Holway, Jon C., Robinson, Alexander J.
• Granted Patent: US 8,096,074 B2
• Time in Patent Office: Days
• US Class Current: 42/16
• CPC Class Codes: F41A 11/00 Assembly or disassembly features; Modular concepts; Articulated or collapsible guns F41A3/64, F41A19/10 - F41A19/15, F41A21/48, F41A25/26 take precedence
• CPC Class Codes: F41A 15/14 the ejector being mounted on or within the bolt; Extractors per se
• CPC Class Codes: F41A 17/42 Safeties for locking the breech-block or bolt in a safety position F41A17/32, F41A17/36, F41A17/40 take precedence ; anti-rebound arrangements F41A3/70
• CPC Class Codes: F41A 17/76 automatically operated, i.e. operated by breech opening or closing movement
• CPC Class Codes: F41A 19/43 in bolt-action guns
• CPC Class Codes: F41A 21/485 using screws or bolts
• CPC Class Codes: F41A 3/26 semi-automatically or automatically operated, e.g. having a slidable bolt-carrier and a rotatable bolt
• CPC Class Codes: F41A 3/36 Semi-rigid bolt locks, i.e. having locking elements movably mounted on the bolt or on the barrel or breech housing
• CPC Class Codes: F41A 3/66 Breech housings or frames; Receivers
• CPC Class Codes: F41A 3/70 Anti-rebound arrangements, i.e. preventing rebound of the bolt out of the firing position safeties for locking the breech-block or bolt in a safety position F41A17/42
• CPC Class Codes: F41A 5/12 mounted in a gun having a fixed barrel
• CPC Class Codes: F41A 5/18 gas-operated
• CPC Class Codes: F41A 5/24 by direct action of gas pressure on bolt or locking elements

Abstract

A firearm including a barrel having a chamber and an integrally formed upper receiver having a passageway, an accessory rail extending the complete length of the upper receiver, and a guidance feature extending along the passageway. The firearm also includes an operating rod having an anti-bounce mechanism, a bolt that is rotated counter-clockwise to lock against the chamber, a bolt carrier having a safety extension disposed below the bolt that prevents a hammer from striking a firing pin until the bolt is locked against the chamber, a lower receiver, a recoil spring assembly, and a fire control group. The bolt includes a polymer spring that biases a sliding extractor against the base of a cartridge. The sliding extractor is disposed at an angle ranging from thirty degrees to fifteen degrees on the bolt face to provide a low ejection angle from the firearm.

Claims

1. A bolt configured for use in a firearm receiver, comprising:

a sliding extractor;

a bolt head comprising an extractor slot to receive the sliding extractor;

a bolt face; and

a polymer spring disposed proximate to the sliding extractor and biasing the sliding extractor against a base of a cartridge to retain a base of a cartridge against the bolt face.

2. The bolt of claim 1, further comprising a spring recess to receive the polymer spring.

3. The bolt of claim 1, further comprising a detent disposed between and engaging the polymer spring and the sliding extractor.

4. The bolt of claim 1, wherein the sliding extractor and the extractor slot each include a cross-sectional T-shape.

5. The bolt of claim 1, further comprising an extending protrusion that is configured to be received within a cam slot.

6. The bolt of claim 1, wherein the extractor includes an extractor head configured to engage a support surface of a barrel extension to support the extractor against a base of a cartridge when the bolt is locked within a barrel extension.

7. The bolt of claim 1, wherein the extractor includes an extractor head configured to engage a support surface of the firearm receiver to support the extractor against a base of a cartridge when the bolt is locked within a barrel extension.

8. A bolt configured for use in a firearm receiver, comprising:

an extractor;

a bolt face; and

a polymer spring disposed proximate to the extractor and biasing the extractor against a base of a cartridge to retain a base of a cartridge against the bolt face.

9. The bolt of claim 8, further comprising a spring recess to receive the polymer spring.

10. The bolt of claim 8, further comprising a detent disposed between and engaging the polymer spring and the extractor.

11. The bolt of claim 8, wherein the extractor includes a cross-sectional T-shape.

12. The bolt of claim 8, wherein the extractor includes an extractor head configured to engage a support surface of a barrel extension to support the extractor against a base of a cartridge when the bolt is locked.

13. The bolt of claim 8, wherein the extractor includes an extractor head configured to engage a support surface of the firearm receiver to support the extractor against a base of a cartridge when the bolt is locked.

14. The bolt of claim 8 further comprising:

a feed lug, and

a second lug,

wherein the feed lug is configured to push a cartridge out of a magazine and into a chamber and the second lug is configured to provide support to the bolt when the bolt is locked within a barrel extension.

15. The bolt of claim 8 further comprising:

a feed lug, and

a second lug,

wherein the feed lug is configured to push a cartridge out of a magazine and into a chamber and the third lug is configured to provide support to the bolt when the bolt is locked within a portion of the firearm receiver.

16. The bolt of claim 8 further comprising a lug including a locking feature configured to lock the bolt within a barrel extension.

17. The bolt of claim 8 further comprising a lug including a locking feature configured to lock the bolt within a locking portion of the firearm receiver.

18. The bolt of claim 8 further comprising an extractor lug including a locking feature configured to lock the bolt within a barrel extension.

19. The bolt of claim 8 further comprising an extractor lug including a locking feature configured to lock the bolt within a locking portion of the firearm receiver.

20. The bolt of claim 8 wherein the bolt further comprises guide surfaces configured to prevent the bolt from rotating as the bolt travels through the firearm receiver.