May 20, 2025

US12305949 - Firearm assemblies with multiple gas ports

An assembly for directing propellant gas to an action of a firearm includes a barrel and a gas block. The barrel has a plurality of gas ports that communicate with the bore of the barrel. The barrel and the gas block define a passage that receives pressurized propellant gas from the bore by way of the barrel gas ports, and directs the propellant gas to a gas port of the gas block. The plurality of barrel gas ports and the passage act as a manifold in which the propellant gas is taken from multiple locations within the barrel, combined into a single flow, and directed into the gas block via the gas block gas port. The pressurized gas is then routed to an action of the firearm by way of a gas tube and a gas key.

Assignee: WHG PROPERTIES, LLC
Inventors: William H. Geissele
Filing date: 2023-07-18

firearmgasbarrelaction

The patent describes a firearm assembly that utilizes multiple gas ports in the barrel to efficiently direct pressurized propellant gas to the action of the firearm through a gas block. This design allows for the combination of gas from various locations within the barrel, enhancing the performance and reliability of the firearm’s operation.

Claim 1

An assembly for directing gas to an action of a firearm, comprising: a barrel defining a bore configured to guide a projectile as the projectile is propelled through the bore by pressurized gas, the barrel having a plurality of barrel gas ports formed therein, each of the plurality of barrel gas ports being in fluid communication with the bore; and at least one gas block configured to align with an axial location of the plurality of barrel gas ports, the at least one gas block having a gas block gas port formed therein, wherein the at least one gas block defines a groove as part of a passage configured to direct the pressurized gas from the plurality of barrel gas ports to the gas block gas port, wherein the groove extends around an entire circumference of an inner surface of the at least one gas block wherein all of the plurality of barrel gas ports are in fluid communication with the groove, wherein the gas block gas port is in fluid communication with the groove, and the assembly is configured to conduct pressurized gas from the barrel through the plurality of barrel gas ports into the groove and from the groove into the gas block gas port, wherein the plurality of barrel gas ports are spaced apart radially about an axis of the barrel. a barrel defining a bore configured to guide a projectile as the projectile is propelled through the bore by pressurized gas, the barrel having a plurality of barrel gas ports formed therein, each of the plurality of barrel gas ports being in fluid communication with the bore; and at least one gas block configured to align with an axial location of the plurality of barrel gas ports, the at least one gas block having a gas block gas port formed therein, wherein the at least one gas block defines a groove as part of a passage configured to direct the pressurized gas from the plurality of barrel gas ports to the gas block gas port, wherein the groove extends around an entire circumference of an inner surface of the at least one gas block wherein all of the plurality of barrel gas ports are in fluid communication with the groove, wherein the gas block gas port is in fluid communication with the groove, and the assembly is configured to conduct pressurized gas from the barrel through the plurality of barrel gas ports into the groove and from the groove into the gas block gas port, wherein the plurality of barrel gas ports are spaced apart radially about an axis of the barrel.

Google Patents

https://patents.google.com/patent/US12305949

USPTO PDF

https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/12305949