Smith & Wesson Inc.

An inertial decoupler and suppressor assembly, associated components, and associated methods. The inertial decoupler is adjustable to change a preload of a spring biasing a piston toward an at-rest position and/or to change a permitted travel distance of the piston away from the at-rest position. The inertial decoupler can be removable from the suppressor and usable with other suppressors, or can be integrated with a dedicated suppressor.

A magazine for feeding ammunition to a firearm includes a tube surrounding a longitudinal axis and defining a central space for receiving the ammunition. The tube has first and second ends. A follower is slidably movable within the tube. A butt plate is removeably attached to the first end. The butt plate defines a bore. A plunger is movably positioned within the bore and includes a first mounting cam. A first catch, mounted on the butt plate, is engageable with the tube proximate to the first end. The first catch is movable relative to the butt plate in a direction transverse to the longitudinal axis. The first catch includes a cam follower engageable with the first cam. A spring acts between the plunger and the follower for biasing the plunger toward the butt plate and the follower toward the second end.

A sear mechanism for a firearm pivotably mounts a sear body on a sear lever which is pivotably mounted on the firearm frame. An actuator lever is also pivotably mounted on the frame. The actuator lever is pivoted by a trigger bar connected to the firearm's trigger. Pivoting of the actuator lever when the trigger is pulled allows the sear lever to pivot. Pivoting of the sear lever allows the sear body to fall off of a surface on a striker, releasing the striker to discharge the firearm.

A trigger return spring assembly mountable on a frame of a firearm includes a trigger mounted on the frame pivoting about a first axis of rotation. A trigger bar attached to the trigger pivots relative to the trigger about a second axis of rotation fixed on the trigger. A bore extends through the trigger along a third axis oriented transversely to and positioned between the first and second axes of rotation. A plunger extends through the bore and is movable along the third axis. A first end of the plunger is attached to the trigger bar and a second end has a retaining surface oriented transversely to the third axis. A shoulder is positioned within the bore proximate to the trigger bar. A compression spring captured within the bore, between the shoulder and the retaining surface, exerts a force pushing the retaining surface away from the shoulder.

An ammunition magazine for a firearm uses a spacer to extend the grip. The spacer is attached to the magazine's tube using a combined fastener and detent mechanism which acts between the magazine's butt plate and floor plate. The butt plate is attached to the magazine tube and the spacer is captured between the butt plate and floor plate.

A shotgun has right and left magazines from which ammunition may be fed to the action using a selector mounted on a movable fore-end chassis whose motion cycles the action. An interrupter prevents the selector from switching between magazines unless the action is in battery with the fore-end chassis fully forward toward the muzzle end of the shotgun. Respective right and left outer cut-offs on the magazines cooperate with an inner cut-off to ensure proper coordination of ammunition feed as the action is cycled by motion of the fore-end chassis. The outer cut-offs are also manually operable to permit removal of ammunition from the magazines without cycling the action.