Abstract: Provided herein are buffer systems, bolt assemblies, firearms, and related methods, devices, and assemblies. A bolt carrier assembly for a firearm of an example includes: a bolt carrier body defining a cavity extending along a longitudinal axis of the bolt carrier; at least one weight disposed within the cavity; a forward stop at a forward end of the cavity; and an aft stop at an aft end of the cavity. In some embodiments, the bolt carrier assembly may include a spring, where the spring biases the at least one weight along the longitudinal axis toward at least one of the forward stop or the aft stop, where the at least one weight is configured to be driven against the spring bias in response to a firing action of the firearm.

Abstract: Various systems, methods, and apparatuses related to a firearm suppressor are provided. An example suppressor for a firearm may define a distal end and a proximal end. The suppressor may include an inner body and an external shroud. The inner body may include a muzzle attachment portion defined at or proximate the proximal end of the suppressor and a plurality of baffles each defining an opening. An expansion chamber may be defined between the muzzle attachment portion and one of the plurality of baffles. The external shroud may be configured to at least partially cover the inner body. The external shroud may be configured to permit at least a portion of propellent gas within the inner body to exit the suppressor via a secondary opening disposed at a location between one of the plurality of baffles and the proximal end of the suppressor.

Abstract: Provided herein are buffer systems, bolt assemblies, firearms, and related methods, devices, and assemblies. A bolt carrier assembly for a firearm of an example includes: a bolt carrier body defining a cavity extending along a longitudinal axis of the bolt carrier; at least one weight disposed within the cavity; a forward stop at a forward end of the cavity; and an aft stop at an aft end of the cavity. In some embodiments, the bolt carrier assembly may include a spring, where the spring biases the at least one weight along the longitudinal axis toward at least one of the forward stop or the aft stop, where the at least one weight is configured to be driven against the spring bias in response to a firing action of the firearm.