System for a delayed-opposed-piston gas action assembly. Specifically, the system is comprised of a bolt, a bolt carrier, a gas block, a bolt piston, and a vent piston. Each piston will have a corresponding piston cup that will act on the piston from the gas discharged from the round. Each piston will also have a corresponding spring to bring the piston back to its original position after the gas has dissipated from the system. During the process of the firearm being discharged, the two pistons will act on the bolt carrier, causing the casing of the round to be ejected from the firearm, and a new round to be loaded into the firearm, so that the firearm can be discharged again.

The invention relates to a gas piston for a weapon, which is characterized by a spring introduced in the gas piston and a plunger, which engages on one end of the spring, wherein the spring is supported by the other end at the end of the gas piston opposite the plunger. This gas piston can be a component of a gas piston assembly having a counter piston, which is for use in a weapon. The gas piston or the plunger is supported e.g. on the weapon housing. With the special construction of the gas piston or the gas piston assembly formed with same, the gas piston can be transferred from a working position into a resting position within a weapon housing of the weapon.

The invention relates to a gas piston for a weapon, which is characterized by a spring introduced in the gas piston and a plunger, which engages on one end of the spring, wherein the spring is supported by the other end at the end of the gas piston opposite the plunger. This gas piston can be a component of a gas piston assembly having a counter piston, which is for use in a weapon. The gas piston or the plunger is supported e.g. on the weapon housing. With the special construction of the gas piston or the gas piston assembly formed with same, the gas piston can be transferred from a working position into a resting position within a weapon housing of the weapon.

System for a delayed-opposed-piston gas action assembly. Specifically, the system is comprised of a bolt, a bolt carrier, a gas block, a bolt piston, and a vent piston. Each piston will have a corresponding piston cup that will act on the piston from the gas discharged from the round. Each piston will also have a corresponding spring to bring the piston back to its original position after the gas has dissipated from the system. During the process of the firearm being discharged, the two pistons will act on the bolt carrier, causing the casing of the round to be ejected from the firearm, and a new round to be loaded into the firearm, so that the firearm can be discharged again.

The invention relates to a gas piston for a weapon, which is characterized by a spring introduced in the gas piston and a plunger, which engages on one end of the spring, wherein the spring is supported by the other end at the end of the gas piston opposite the plunger. This gas piston can be a component of a gas piston assembly having a counter piston, which is for use in a weapon. The gas piston or the plunger is supported e.g. on the weapon housing. With the special construction of the gas piston or the gas piston assembly formed with same, the gas piston can be transferred from a working position into a resting position within a weapon housing of the weapon.

The invention relates to a gas piston for a weapon, which is characterized by a spring introduced in the gas piston and a plunger, which engages on one end of the spring, wherein the spring is supported by the other end at the end of the gas piston opposite the plunger. This gas piston can be a component of a gas piston assembly having a counter piston, which is for use in a weapon. The gas piston or the plunger is supported e.g. on the weapon housing. With the special construction of the gas piston or the gas piston assembly formed with same, the gas piston can be transferred from a working position into a resting position within a weapon housing of the weapon.

Bolt carrier groups (BCGs) for weapon systems are provided herein. The BCG includes a carrier assembly, a bolt assembly, and a gas chamber disposed therebetween. The carrier assembly contains a carrier body that includes a shoulder, a piston surface, and an inlet port. The shoulder is disposed within the carrier body and contains a channel and the piston surface is located on the shoulder at least partially encompassing the channel. The inlet port extends through the carrier body and is configured for receiving propellant gas into the carrier body. The bolt assembly is at least partially contained within the carrier assembly and includes a bolt head opposite of a bolt tail where the bolt tail is at least partially protruding into the channel in the shoulder. The gas chamber is disposed between the carrier body, the piston surface, the bolt tail, and two gas seals disposed on the bolt assembly.

Bolt carrier groups (BCGs) for weapon systems are provided herein. The BCG includes a carrier assembly, a bolt assembly, and a gas chamber disposed therebetween. The carrier assembly contains a carrier body that includes a shoulder, a piston surface, and an inlet port. The shoulder is disposed within the carrier body and contains a channel and the piston surface is located on the shoulder at least partially encompassing the channel. The inlet port extends through the carrier body and is configured for receiving propellant gas into the carrier body. The bolt assembly is at least partially contained within the carrier assembly and includes a bolt head opposite of a bolt tail where the bolt tail is at least partially protruding into the channel in the shoulder. The gas chamber is disposed between the carrier body, the piston surface, the bolt tail, and two gas seals disposed on the bolt assembly.

Bolt carrier groups (BCGs) for weapon systems are provided herein. The BCG includes a carrier assembly, a bolt assembly, and a gas chamber disposed therebetween. The carrier assembly contains a carrier body that includes a shoulder, a piston surface, and an inlet port. The shoulder is disposed within the carrier body and contains a channel and the piston surface is located on the shoulder at least partially encompassing the channel. The inlet port extends through the carrier body and is configured for receiving propellant gas into the carrier body. The bolt assembly is at least partially contained within the carrier assembly and includes a bolt head opposite of a bolt tail where the bolt tail is at least partially protruding into the channel in the shoulder. The gas chamber is disposed between the carrier body, the piston surface, the bolt tail, and two gas seals disposed on the bolt assembly.

A firearm may have gas operating system that renders the firearm capable of firing a wide range of shot loads by passively or automatically compensating for different shot loads. The firearm may include a plurality of ports formed in the firearm barrel, and corresponding ports formed in a gas block of the gas operating system. The ports tap gases generated during firing which are used to cycle the firearm. When firing different cartridge loads, differing combinations of the ports are selectively at least partially blocked or otherwise obstructed by the cartridge casing according to the size of the cartridge. Additionally, the gas operating system includes compensating gas pistons with internal relief valves that can bleed off excess gas to compensate for larger shot loads regardless of the size of the cartridge.