A receiver system comprises upper and lower receiver bodies, a lower receiver body, a bolt carrier, and an action-control lever. The upper receiver body is a semi-automatic firearm upper receiver body. The lower receiver body includes a stock mounting flange having a stock receptacle that is matingly engageable with a receiver engaging portion of a stock. The bolt carrier is slidably disposed within a bolt carrier receiving bore of the upper receiver body. The action-control lever has a hand loop and a first attachment arm having a proximate end portion thereof attached to the hand loop. The first attachment arm is pivotably attached at a distal end thereof to the lower receiver body for being pivoted between a battery-ready position and a cartridge-ejecting position relative to the lower receiver body. The action-control lever is attached to the bolt carrier through an articulating coupling assembly.

A firearm is provided that comprises a barrel, a magazine tube below the barrel, and a handguard with first and second portions. A clamp between the handguard portions has a main body with deformable lugs and a fastener. The handguard's first portion features an arcuate surface for the barrel and a bore for the magazine tube. The lugs move inward and downward, securing the handguard. The clamp is positioned within a recess between the handguard portions. Fasteners are accessible through apertures in the handguard. The clamp contacts both the magazine tube and the barrel when tightened. The clamp includes a main body and deformable lugs, with a fastener to secure the handguard. The lugs are deformable, made of various materials, and designed to bend upon tightening. The method involves positioning and tightening the clamp to deform the lugs and secure the handguard.

Systems and methods for firearm suppression include a firearm suppressor structured to be coupled adjacent to and in contact with a receiver of a firearm. The suppressor comprises a baffle assembly structured to modulate exhaust gases discharged upon firing. In some embodiments, the suppressor includes a firearm adapter for concentric alignment with the firearm's barrel and a magazine clamp to maintain alignment with a tubular magazine. The baffle assembly can include an inner baffle sleeve forming a primary blast chamber and an outer tube forming a secondary blast chamber. An end cap can thread onto the inner baffle sleeve to compress the baffle stack against an internal barrel nut, ensuring secure attachment to the firearm. These systems can be adapted for various firearm types, including lever action, bolt action, pump action, semi-automatic, and fully automatic firearms.

Systems and methods for firearm suppression include a firearm suppressor structured to be coupled adjacent to and in contact with a receiver of a firearm. The suppressor comprises a baffle assembly structured to modulate exhaust gases discharged upon firing. In some embodiments, the suppressor includes a firearm adapter for concentric alignment with the firearm's barrel and a magazine clamp to maintain alignment with a tubular magazine. The baffle assembly can include an inner baffle sleeve forming a primary blast chamber and an outer tube forming a secondary blast chamber. An end cap can thread onto the inner baffle sleeve to compress the baffle stack against an internal barrel nut, ensuring secure attachment to the firearm. These systems can be adapted for various firearm types, including lever action, bolt action, pump action, semi-automatic, and fully automatic firearms.