AUTOMATIC/SEMI-AUTOMATIC RIFLE ASSEMBLY FOR LARGE CALIBER BELTED CARTRIDGES

• US 20150267979A1
• Filed: 09/05/2014
• Published: 09/24/2015
• Est. Priority Date: 09/05/2013
• Status: Active Grant

• Current Assignee: Guardian Defense LLC
• Original Assignee: Acutech, LLC
• Inventors: Miller, Brandon W., Grommet, Dean G., Boyce, Joshua R.
• Granted Patent: US 10,330,410 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: F41A 19/13 Percussion or firing pins, i.e. fixed or slidably-mounted striker elements; Mountings therefor F41A19/26 takes precedence
• CPC Class Codes: F41A 3/00 Breech mechanisms, e.g. locks
• 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 5/18 gas-operated
• CPC Class Codes: F41A 9/29 Feeding of belted ammunition
• CPC Class Codes: F41A 9/34 from magazines magazines for belted ammunition per se F41A9/79
• CPC Class Codes: F41A 9/61 Magazines
• CPC Class Codes: F41A 9/79 for belted ammunition

Abstract

Embodiments of the present disclosure provide modifications to the AR platform operating system such that the platform now is competent to fire large caliber cartridges, including belted cartridges, providing longer range and greater barrier penetration without substantially altering the characteristic features and component inter-relationships of this platform.

Claims

1-18. -18. (canceled)

19. An automatic or semi-automatic firearm assembly configured for firing a belted cartridge, the firearm assembly comprising:

a firing pin;

a bolt assembly operative with the firing pin including a bolt and a bolt extractor; and

a barrel chamber having anterior and posterior ends for receiving the belted cartridge, wherein the barrel chamber includes a counter bore at its posterior end to interface with the belted portion of the belted cartridge.

20. The firearm assembly of claim 19, wherein the bolt assembly is disposed within a bolt carrier for automatic action cycling.

21. The firearm assembly of claim 20, wherein the bolt carrier includes relief cuts for reduced mass.

22. The firearm assembly of claim 20, further comprising a bolt carrier return system for returning the carrier to a biased position.

23. The firearm assembly of claim 22, wherein the bolt carrier return system includes a biasing device.

24. The firearm assembly of claim 22, wherein the bolt carrier return system further includes a travel limiting device.

25. The firearm assembly of claim 19, further comprising a direct impingement gas system for automatic action cycling.

26. The firearm assembly of claim 25, wherein the gas system is sized and configured for a belted cartridge.

27. The firearm assembly of claim 19, configured to tolerate pressures in the range of at least 60,000 psi during operation.

29. The firearm assembly of claim 19, having an overall increased length in the range of about 0.90 inches to 1.5 inches when compared to the overall length of an AR-10 assembly.

30. The firearm assembly of claim 19, wherein the bolt extractor includes a groove having a radius in the range of about 0.260 inches to 0.270 inches.

31. The firearm assembly of claim 19, wherein the bolt has a bolt face having a diameter in the range of 0.530 inches to 0.540 inches.

32. The firearm assembly of claim 19, wherein the firing pin shaft has an overall increased length in the range of about 1.5 inches to 1.85 inches when compared with the shaft of an AR-10 firing pin.

33. The firearm assembly of claim 19, wherein the counter bore chamber depth is in the range of 0.0905 inches to 0.0965 inches.

34. The firearm assembly of claim 19, wherein the counter bore diameter is in the range of 0.530 inches to 0.535 inches.

35. The firearm assembly of claim 20, wherein the bolt carrier has an overall increased length in the range of 0.9 inches to 1.5 inches when compared with an AR-10 bolt carrier.

36. The firearm assembly of claim 19, further comprising a magazine having a magazine body defining an inner chamber for receiving stacked belted cartridges, the inner chamber having an internal radius in the range of about 16 inches to about 20 inches.

28. (canceled)

37-39. -39. (canceled)

40. A magazine for a firearm assembly automatic or semi-automatic firearm assembly, the magazine comprising:

a magazine body defining an inner chamber having length, width, and height dimensions, the inner chamber configured for receiving one more belted cartridges, the inner chamber having an internal radius in the range of about 16 inches to about 20 inches; and

a follower assembly configured for following stacked belted cartridges in the magazine body.

41. The magazine of claim 40, further comprising double stack capacity.

42. The magazine of claim 40, made from a non-metal material.

43-45. -45. (canceled)