Smith & Wesson Inc.

A suppressor baffle and a suppressor for a firearm. The suppressor includes a firearm attachment portion, a sleeve portion, and a baffle assembly with a plurality of baffles. At least one of the baffles includes a tubular body with a proximal exterior surface. The proximal exterior surface has a plurality of spaced-apart annular ridges. A first annular ridge includes a first annular compression surface and a first annular expansion surface, and a second annular ridge includes a second annular compression surface. The ridges are shaped and arranged to define a convex first expansion corner between the first annular compression surface and the first annular expansion surface, and a concave first compression corner between the first annular expansion surface and the second annular compression surface. Gas flowing along the proximal exterior surface expands at the first expansion corner and compresses at the first compression corner to dissipate energy in the gas.

A firearm having a fixed magazine uses a latch to secure upper and lower receivers to one another in a closed position. The upper and lower receivers can be pivoted relatively to one another into an open position providing access to the magazine for loading by rotating the latch to release the upper and lower receivers from one another. The latch includes a hook spring biasing a hook contact surface of the latch to engage a hook receiving surface of a receiver when the receivers are moved from the open position to the closed position.

A firearm has a receiver with a receptacle. A stock has a projection which is received within the receptacle to mount the stock on the receiver. A spring biased detent holds the stock in engagement with the receptacle. Manual manipulation of the detent allows the stock to be removed from the firearm's receiver.

A bullpup shotgun which ejects shells from the bottom of its action has a reciprocable cover which, when in a closed position, overlies the breech end of the shotgun's barrel. When in an open position, the cover is in spaced relation to the barrel breech end, allowing access to the shotgun's action to clear an ammunition feed malfunction. The cover is mounted on a butt stock, and is slidable or rotatable relatively to the shotgun's butt stock to effect motion of the cover between the open and closed positions.

A firearm sound suppressor and associated methods. The suppressor can include first and second firearm connectors at opposite ends of the suppressor for connecting to firearm mounts of different types. The suppressor can include symmetrical baffling and/or symmetrical gas flow passaging such that sound reduction performance of the suppressor is generally the same notwithstanding whether the first or second firearm connectors is used to connect the suppressor to the firearm. A protector can be used to protect the firearm connector that is not connected to the firearm.

A semiautomatic pistol has a takedown lever which also acts as an ejector. The takedown lever includes an ejector head and a finger. The finger is engageable with a sear when the takedown lever is rotated by depressing the ejector head through the ejection port when the slide is out of battery. This rotates the sear so that the slide may be removed by sliding it toward the muzzle end of the pistol.

A bullpup shotgun which ejects shells from the bottom of its action has a reciprocable cover which, when in a closed position, overlies the breech end of the shotgun's barrel. When in an open position, the cover is in spaced relation to the barrel breech end, allowing access to the shotgun's action to clear an ammunition feed malfunction. The cover is mounted on a butt stock, and the butt stock may be movable relatively to the shotgun's receiver to effect motion of the cover between the open and closed positions.

An action for a firearm uses a rotating barrel on which are mounted lugs and a cam follower. The barrel is positioned coaxially within a tube fixed to the frame of the firearm. A cam, engaged by the cam follower, is also fixed to the frame. A gas space is defined between the tube and the barrel by a thrust surface on the barrel and a reaction surface on the tube. A gas port connects the gas space with the barrel's bore. A slide overlies the tube and defines longitudinally oriented grooves which receive the lugs when the barrel is rotated by interaction between the cam and the cam follower to align the lugs and the grooves. Motion of the barrel is arrested by interaction between the cam and cam follower, and motion of the slide relative to the barrel is permitted when the lugs align and engage the grooves.

A shotgun is formed of sub-assemblies which include a lower receiver upon which a butt stock and an upper receiver are mounted. The lower receiver houses the fire control mechanism, the butt stock includes an ammunition elevator and a breech cover. Magazine tubes, ammunition cut-offs, a selector, a selector interrupter and the barrel are mounted on the upper receiver.