A damping assembly for a firearm is provided. The damping assembly includes at least a gas piston and a recoil spring, which may be arranged coaxially or in parallel. The gas piston is disposed within a gas tube which has access to the bore of the firearm through a gas inlet. Pressurized gas from the bore can enter the gas tube via the inlet and push against the gas piston, which can dampen the cycle rate of the firearm.

A damping assembly for a firearm is provided. The damping assembly includes at least a gas piston and a recoil spring, which may be arranged coaxially or in parallel. The gas piston is disposed within a gas tube which has access to the bore of the firearm through a gas inlet. Pressurized gas from the bore can enter the gas tube via the inlet and push against the gas piston, which can dampen the cycle rate of the firearm.

A firearm operating system includes a forward bolt with an internal cavity, a carrier disposed on a rear side of the forward bolt where the carrier includes a cavity, a short cam pin, a plurality of bearings, a retracted configuration, and a deployed configuration. At least a portion of a forward section of the short cam pin is disposed within the internal cavity of the forward bolt. At least a portion of a rear section of the short cam pin is disposed within the cavity of the carrier. Movement from the retracted configuration to the deployed configuration includes movement in a forward/aft direction of the short cam pin relative to the forward bolt and movement of the plurality of bearings.

A firearm operating system includes a forward bolt with an internal cavity, a carrier disposed on a rear side of the forward bolt where the carrier includes a cavity, a short cam pin, a plurality of bearings, a retracted configuration, and a deployed configuration. At least a portion of a forward section of the short cam pin is disposed within the internal cavity of the forward bolt. At least a portion of a rear section of the short cam pin is disposed within the cavity of the carrier. Movement from the retracted configuration to the deployed configuration includes movement in a forward/aft direction of the short cam pin relative to the forward bolt and movement of the plurality of bearings.

A firearm operating system includes a forward bolt with an internal cavity, a carrier disposed on a rear side of the forward bolt where the carrier includes a cavity, a short cam pin, a plurality of bearings, a retracted configuration, and a deployed configuration. At least a portion of a forward section of the short cam pin is disposed within the internal cavity of the forward bolt. At least a portion of a rear section of the short cam pin is disposed within the cavity of the carrier. Movement from the retracted configuration to the deployed configuration includes movement in a forward/aft direction of the short cam pin relative to the forward bolt and movement of the plurality of bearings.

A firearm operating system includes a forward bolt with an internal cavity, a carrier disposed on a rear side of the forward bolt where the carrier includes a cavity, a short cam pin, a plurality of bearings, a retracted configuration, and a deployed configuration. At least a portion of a forward section of the short cam pin is disposed within the internal cavity of the forward bolt. At least a portion of a rear section of the short cam pin is disposed within the cavity of the carrier. Movement from the retracted configuration to the deployed configuration includes movement in a forward/aft direction of the short cam pin relative to the forward bolt and movement of the plurality of bearings.

A gas-delayed blowback firearm includes a lower receiver and an upper receiver releasably coupled thereto. A barrel having a cartridge chamber, an axial bore, and a barrel gas port is secured to the upper receiver. A bolt assembly in the upper receiver reciprocates between a forward in-battery position and a rearward position. A timing block is secured to the bolt assembly. A cylinder housing with an internal gas chamber and a cylinder gas port is secured to the upper receiver. A gas passageway fluidly communicates the barrel gas port with the cylinder gas port. A plunger in the gas chamber is secured to the timing block. The plunger reciprocates with the bolt assembly. Discharge of a cartridge received in the cartridge chamber temporarily pressurizes the gas chamber, applying a forward force to the plunger which causes the plunger to delay rearward travel of the bolt assembly.

A gas-delayed blowback firearm includes a lower receiver and an upper receiver releasably coupled thereto. A barrel having a cartridge chamber, an axial bore, and a barrel gas port is secured to the upper receiver. A bolt assembly in the upper receiver reciprocates between a forward in-battery position and a rearward position. A timing block is secured to the bolt assembly. A cylinder housing with an internal gas chamber and a cylinder gas port is secured to the upper receiver. A gas passageway fluidly communicates the barrel gas port with the cylinder gas port. A plunger in the gas chamber is secured to the timing block. The plunger reciprocates with the bolt assembly. Discharge of a cartridge received in the cartridge chamber temporarily pressurizes the gas chamber, applying a forward force to the plunger which causes the plunger to delay rearward travel of the bolt assembly.

A gas-delayed blowback firearm includes a lower receiver and an upper receiver releasably coupled thereto. A barrel having a cartridge chamber, an axial bore, and a barrel gas port is secured to the upper receiver. A bolt assembly in the upper receiver reciprocates between a forward in-battery position and a rearward position. A timing block is secured to the bolt assembly. A cylinder housing with an internal gas chamber and a cylinder gas port is secured to the upper receiver. A gas passageway fluidly communicates the barrel gas port with the cylinder gas port. A plunger in the gas chamber is secured to the timing block. The plunger reciprocates with the bolt assembly. Discharge of a cartridge received in the cartridge chamber temporarily pressurizes the gas chamber, applying a forward force to the plunger which causes the plunger to delay rearward travel of the bolt assembly.

A gas-delayed blowback firearm includes a lower receiver and an upper receiver releasably coupled thereto. A barrel having a cartridge chamber, an axial bore, and a barrel gas port is secured to the upper receiver. A bolt assembly in the upper receiver reciprocates between a forward in-battery position and a rearward position. A timing block is secured to the bolt assembly. A cylinder housing with an internal gas chamber and a cylinder gas port is secured to the upper receiver. A gas passageway fluidly communicates the barrel gas port with the cylinder gas port. A plunger in the gas chamber is secured to the timing block. The plunger reciprocates with the bolt assembly. Discharge of a cartridge received in the cartridge chamber temporarily pressurizes the gas chamber, applying a forward force to the plunger which causes the plunger to delay rearward travel of the bolt assembly.