Firearm having an indirect gas operating system

• US 7,934,447 B2
• Filed: 11/02/2009
• Issued: 05/03/2011
• Est. Priority Date: 09/17/2004
• Status: Active Grant

• Current Assignee: Colt's Manufacturing IP Holding Company LLC
• Original Assignee: Colt Defense LLC (Colt Defense Holding LLC)
• Inventors: Kuczynko, Grzegorz, Dorsey, Josh
• Primary Examiner(s): HAYES, BRET C
• Application Number:
  US12/610,854
• Publication Number:
  US 20100095834A1
• Time in Patent Office: 547 Days
• Field of Search: 8919101-193, 42/72, 42/750.1, 42/96, 421/11
• US Class Current: 89/193
• CPC Class Codes: F41A 5/28 Adjustable systems

Abstract

A black rifle configuration automatic or semi-automatic firearm having an indirect gas operating system. The firearm has a black rifle configuration receiver assembly having a bolt assembly enclosed within. The bolt assembly having a striking surface and a barrel assembly having a bore, the barrel assembly being coupled to the receiver assembly. A gas block is fitted to the barrel assembly, the gas block having a front folding sight. A rod assembly has a striking rod. Gas discharged from a fired cartridge displaces the piston and causes the striking rod displace the bolt assembly.

Claims

1. A black rifle configuration automatic or semi-automatic firearm having an indirect gas operating system, the firearm comprising:

a black rifle configuration receiver assembly having a bolt assembly enclosed within the receiver assembly and having a striking surface;

a barrel assembly having a bore, the barrel assembly coupled to the receiver assembly;

a gas block mounted to the barrel assembly, the gas block having a cylinder in communication with the bore and having;

a front folding sight dependent from the gas block; and

a rod assembly actuably coupled to the cylinder and having a striking rod;

wherein, gas discharged from a fired cartridge displaces the rod and causes the striking rod to strike the striking surface and displace the bolt assembly.

2. The firearm of claim 1, wherein the striking rod and the bolt assembly disengage each other after the striking rod strikes the bolt assembly.

3. The firearm of claim 1, wherein the gas block comprises a front sight frame having, the cylinder being integrally formed therein.

4. The firearm of claim 1 further comprising a hand guard assembly coupled to the receiver assembly and substantially surrounding the barrel;

wherein, the hand guard assembly has one or more relocateable accessory rails movable from a first position on the hand guard assembly to a second position on the hand guard assembly.

5. The firearm of claim 4, wherein the hand guard assembly is a one piece member of unitary construction.

6. A black rifle configuration automatic or semi-automatic firearm having an indirect gas operating system comprising:

a bolt assembly enclosed within a receiver;

a barrel assembly having a bore and coupled to the receiver;

a front sight frame having an integral cylinder, the front sight frame fitted to barrel assembly, the cylinder in communication with the bore;

a front folding sight movably coupled to the front sight frame; and

a piston assembly having a piston end and a striking end, the piston end fitted to the cylinder;

wherein, gas discharged from a fired cartridge displaces the piston and causes the striking end to displace the bolt assembly.

7. The firearm of claim 6, wherein the striking end and the bolt assembly disengage each other after the striking end strikes the bolt assembly.

8. The firearm of claim 6 further comprising a hand guard assembly coupled to the receiver assembly and substantially surrounding the barrel;

wherein, the hand guard assembly has one or more relocateable accessory rails movable from a first position on the hand guard assembly to a second position on the hand guard assembly.

9. The firearm of claim 8, wherein the hand guard assembly and the receiver assembly are of one piece unitary construction.

10. The firearm of claim 6, wherein the bolt assembly has a removable striking surface, and wherein the piston assembly comprises a separable piston and striking rod, and wherein the piston is spring loaded into the cylinder via a spring force exerted by the striking rod.

11. A black rifle configuration automatic or semi-automatic firearm having an indirect gas operating system, the firearm comprising:

black rifle configuration receiver assembly having a bolt assembly enclosed within;

a barrel assembly having a bore, the barrel assembly coupled to the receiver assembly;

a hand guard assembly coupled to the receiver assembly and substantially surrounding the barrel;

a gas block fitted to the barrel assembly; and

a rod assembly having a striking rod;

wherein, gas discharged from a fired cartridge displaces the rod assembly and causes the striking rod to strike and displace the bolt assembly, and wherein the hand guard assembly has one or more relocateable accessory rails movable from a first position on the hand guard assembly to a second position on the hand guard assembly.

12. The firearm of claim 11, wherein the striking rod and the bolt assembly disengage each other after the striking end strikes the bolt assembly.

13. The firearm of claim 11, wherein the gas block comprises a front sight frame having a moveable front sight.

14. The firearm of claim 11, wherein the hand guard assembly is a one piece member of unitary construction.

15. The firearm of claim 14, wherein the bolt assembly has a removable striking surface, and wherein the rod assembly comprises a separable piston and striking rod, and wherein the piston is spring loaded into the cylinder via a spring force exerted by the striking rod.

16. A black rifle configuration automatic or semi-automatic firearm having an indirect gas operating system comprising:

a bolt assembly having a striking surface, the bolt assembly enclosed within and operates within a black rifle configuration receiver assembly;

a barrel assembly having a bore, the barrel assembly coupled to the receiver assembly;

a gas block having a cylinder, the gas block fitted to the barrel assembly, the cylinder in communication with the bore; and

an operating rod assembly having a piston interface end and a striking_end, the piston interface end being actuably coupled to the cylinder;

wherein, gas discharged from a fired cartridge pressurizes the cylinder displacing the piston interface end and causes the striking end to strike the striking surface displacing the bolt assembly, and wherein the striking end and the striking surface disengage each other after the striking end strikes the striking surface.