Smith & Wesson Corporation

Sig Sauer Gmbh

Matteo Vincenzio Viviano

Mark C Laney

David B Hopkins

Joshua Raymond Lloyd

A firearm stock with adjustable length of pull and/or comb height is disclosed. In one example, a butt plate assembly includes a tongue defining top and bottom chamfered outside edges. A stock body defines top and bottom chamfered inside edges along a slot opening. Moving a locking assembly to a locked position draws the chamfered outside edges on the tongue against the chamfered inside edges along the slot opening. A locking plate can be used between the fastener and the tongue. In another example, an adjustable comb assembly includes a cheek plate with posts received in post openings that extend into the stock body. A locking lever is coupled to a fastener that extends laterally through the stock body. Moving the lever to the locked position draws together opposite sides of the stock body to constrain the post openings, thereby retaining the position of the comb.

Firearm stock with adjustable butt plate and locking comb assembly

A rotary ammunition magazine cooperates with a bolt catch to hold the bolt of a firearm out of battery in an open position after the last round has been fired. A cam mounted on the rotor of the magazine actuates a movable body on the magazine housing as the cam rotates to feed ammunition to the action. The body moves to an extended position and engages a bolt catch pivotably mounted in the firearm receiver. The bolt catch is pivoted by the body into a position where it will engage the bolt and prevent it from returning to battery after the last round has been fired.

Rotary magazine and bolt catch

A method of installing a safety selector in a firearm includes inserting the safety selector into an opening in the firearm, aligning a hole extending through the safety selector with a cavity extending transversely from the opening, inserting a spring through the hole and into the cavity, inserting a detent plunger through the hole and at least partially into the cavity, thereby compressing the spring, and moving the safety selector within the opening transversely to the cavity so as to capture the detent plunger at least partially within the cavity. The invention also encompasses a method of removing the safety selector.

Method of installing and removing a safety selector

A metal tube provides a bearing for a bolt carrier in a rifle. The tube is machined to provide openings and co-molded with a polymer outer shroud to form a lightweight composite upper receiver. The tube has an inner surface that supports the bolt carrier in its reciprocal motion during cycling of the rifle action during firing. The length and diameter of the tube are designed to prevent tilt of the bolt carrier during operation.

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Harrison Township, MI, United States of America

Matteo Vincenzio Viviano