Gas operating system for an automatic firearm
AssigneeSig Sauer, Inc.
InventorsDouglas Aubin, David Michael Wilkes, Aaron C. Sakash, Lindsay Bunch
Life of this patent
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Abstract
Techniques and architectures are disclosed for a gas operating system for a firearm. The system includes a barrel having a bore including a rifled portion. Attached to the barrel is a gas block. Located distally of the rifled portion of the bore is a gas expansion chamber in fluid communication with the bore and the gas block. In some examples, the gas expansion chamber includes a diameter at least twice the bore diameter. The gas block of the gas operating system, in some examples, includes a piston, where in response to receiving gases from the gas expansion chamber, the piston cycles the gas operating system.
Claims26
A gas operating system for a firearm, the system comprising:
- a barrel extending from a proximal end to a distal end, the barrel defining a bore extending therethrough along a bore axis, the bore including a rifled bore portion with a first bore diameter;
- and
- a gas block attached to a distal end portion of the barrel;
- wherein the gas operating system defines a gas expansion chamber located distally of the rifled bore portion, the gas expansion chamber in fluid communication with the bore and the gas block and having a chamber diameter greater than the first bore diameter.
A gas operating system for a firearm, the system comprising:
- a gas block defining a first cylinder, a second cylinder in fluid communication with the first cylinder, and a gas port in direct communication with the first cylinder;
- and
- a barrel extending longitudinally and defining a bore with a bore diameter, the barrel having a distal end portion with a distal barrel end, wherein the distal end portion of the barrel is received in the first cylinder with the distal barrel end positioned proximally of the gas port;
- wherein the first cylinder is in fluid communication with the bore via the gas port.
Dependencies are inferred from the claim text.