Abstract: A locking case comprising a base and a lid, where the base and/or the lid comprises a double wall design including a first wall, a second wall, and a channel formed between the first and the second wall; a gasket positioned within the channel; at least one pressure equalization element integrated into the case; a latch comprising a first end and a second end, and a first one or more protrusions positioned between the first end and the second end, the second end comprising a second protrusion configured for removably engaging with a third protrusion of the base, where the first end is rotatably coupled to the lid; and where, closure of the latch is configured to cause the first one or more protrusions of the latch to interface with one or more of the base and the lid to compress the gasket between the base and the lid.

Abstract: A locking case including a base and a lid includes a latch recess integrated into an outer profile of the case, and a latch installed within the latch recess. The latch includes a latch handle including a first end, rotatably coupled with the lid, and a second end including an end protrusion configured for removably engaging with a first portion of the base. The latch also includes a passthrough feature for accommodating a lock mechanism therethrough. The latch handle is larger than the locking mechanism. The latch recess fully accommodates the latch and most or all of the lock mechanism therein when the second end of the latch handle is engaged with the first portion of the base and the lock mechanism is installed through the passthrough feature such that the latch and the lock mechanism do not substantially protrude from the outer profile of the case.

Abstract: An organizer system for use with a case including a base and a lid configured to be matingly coupled together for containing an object therein is disclosed. The organizer system includes a panel system including at least one panel, the at least one panel including a plurality of cutouts formed therein, and a plurality of mounting blocks, each one of the plurality of mounting blocks including a block body and at least one stud. The stud is configured to be removably insertable into one of the plurality of cutouts. When the mounting blocks are inserted into the cutouts adjacent to the object then the base and the lid are coupled together, the panel system and the mounting blocks cooperate to prevent shifting of the object within the case. A method for storing an object in a case using an organizer system is also disclosed.

Abstract: This disclosure describes systems, methods, and apparatus for a locking folding knife having a handle lock and a safety switch arranged around and rotatable around a pivot axis of the knife. In an engaged position the switch overlaps at least a portion of the handle lock and prevents it from moving into an unlocked position. A spring, such as a wire form spring, can be arranged within a pocket of the switch, and when the switch is moved between engaged and disengaged positions the spring can be compressed generating a rotational bias on the switch urging the switch toward either the engaged or disengaged position.

Abstract: A magazine assembly for a firearm and a related method are disclosed. The assembly has a magazine housing defining a track, and a follower assembly. The magazine housing is configured to constrain a cartridge as the cartridge is moved within the magazine assembly such that majority of a proximal surface area of the cartridge does not contact the magazine housing, and a distal tip of the cartridge does not contact the magazine housing.

Abstract: This disclosure describes a firearm stock or arm brace with an adjustable length of pull. The stock or arm brace can include a body and lower stock, where the body includes a buffer tube receiving aperture and the lower stock includes a hollow cavity with a plunger and two concentric springs therein. One or more buttons can be affixed to sides of the plunger in the hollow cavity that can be used to depress the plunger against the force of one or both of the springs. One of the two springs may be shorter than the other and have a greater spring constant than the longer spring. Depressing the plunger against the taller spring may allow a user to adjust the length of pull while greater pressure and engagement of the second spring allows the stock or arm brace to be removed from a buffer tube or receiver extension.

Abstract: An accessory mounting interface for a firearm, and a related method, are disclosed. The interface has a firearm accessory, a first elongated fastener, and a second fastener rotationally mated to the first elongated fastener. The first elongated fastener has right-handed threading and is arranged through a through hole in the firearm accessory with a first end extending below first and second halves of a first slot protrusion of the firearm accessory. The second fastener has a length greater than a width, the length measured along a longitudinal axis of the second fastener, the second fastener having a plurality of straight edges. At least one of the plurality of straight edges prevents the second fastener from rotating further than a closed position when the at least one of the straight edges abuts a sidewall of an elongated slot in the firearm.

Abstract: A magazine assembly for a firearm and a related method are disclosed. The assembly has a magazine housing defining a track, and a follower assembly. The magazine housing is configured to constrain a cartridge as the cartridge is moved within the magazine assembly such that majority of a proximal surface area of the cartridge does not contact the magazine housing, and a distal tip of the cartridge does not contact the magazine housing.

Abstract: This disclosure describes systems, methods, and apparatus for a quick-release adapter between two tripod/bipod/monopod interfaces, wherein a clamping side of the adapter is configured to clamp onto two different types of interfaces or rails such as Arca and Picatinny/Weaver/NATO.

Abstract: An interface for coupling a bipod to a sling stud of a firearm forend. The interface can include two pawls that pivot to release or grasp the sling stud. The pawls can be biased upward via a detent that rides within a vertical aperture in a pivot holder. The pivot holder can move up and down within a vertical aperture in a mounting plate of the interface, and via this movement the pawls may be forced open or closed. A bottom surface of one or both pawls can include an irregular surface different portions of which interface with a top of the detent depending on a vertical position of the pivot holder within the aperture in the mounting plate.

Abstract: A locking case including a base and a lid includes a latch recess integrated into an outer profile of the case, and a latch installed within the latch recess. The latch includes a latch handle including a first end, rotatably coupled with the lid, and a second end including an end protrusion configured for removably engaging with a first portion of the base. The latch also includes a passthrough feature for accommodating a lock mechanism therethrough. The latch handle is larger than the locking mechanism. The latch recess fully accommodates the latch and most or all of the lock mechanism therein when the second end of the latch handle is engaged with the first portion of the base and the lock mechanism is installed through the passthrough feature such that the latch and the lock mechanism do not substantially protrude from the outer profile of the case.

Abstract: An accessory mounting interface for a firearm, and a related method, are disclosed. The interface has a firearm accessory, a first elongated fastener, and a second fastener rotationally mated to the first elongated fastener. The first elongated fastener has right-handed threading and is arranged through a through hole in the firearm accessory with a first end extending below first and second halves of a first slot protrusion of the firearm accessory. The second fastener has a length greater than a width, the length measured along a longitudinal axis of the second fastener, the second fastener having a plurality of straight edges. At least one of the plurality of straight edges prevents the second fastener from rotating further than a closed position when the at least one of the straight edges abuts a sidewall of an elongated slot in the firearm.

Abstract: This disclosure describes systems, methods, and apparatus for detecting and displaying a number of rounds in a firearm magazine comprising a maximum number of N rounds. The magazine may comprise a follower, magnets on the follower, and <N magnetic switches arranged along a path of the magnets when the follower moves along a length of the magazine, the switches configured to activate based on a magnetic field exceeding a threshold, and a first antenna arranged on an inside of the magazine and parallel to a firing direction of the firearm, and configured to wirelessly transmit a round count indication to a second antenna on the firearm, the round count indication based on the round count data, the second antenna affixed to an inside of a magazine well of the firearm and mostly overlapping with the first antenna.

Abstract: Leaf springs for use in a firearm magazine are described. The leaf springs comprising an inner edge, an outer edge, and a channel, and configured to facilitate movement of cartridges within a feed tower of the firearm magazine. The leaf springs can be in a flexed or unflexed position, wherein downward movement of the cartridges in the feed tower outwardly flex the leaf springs into the flexed position to facilitate downward translation of the cartridges by forcing the inner edge of the leaf springs away from the cartridges, and in the unflexed position, the inner edge of the leaf springs is parallel or substantially parallel to an edge of the cartridges in the feed tower.