Abstract: A firearm magazine and a corresponding bolt carrier assembly are provided herein. The firearm magazine includes a magazine body, with the magazine body having a width to accommodate a double stack of cartridges in a zigzag pattern. The firearm magazine also includes a spring coupled to a follower within the magazine body. The magazine body also includes two feed lips coupled to the magazine body, where the two feed lips together hold a single cartridge in place in a center of the magazine body to allow a bolt carrier to push the single cartridge out of the firearm magazine and into a chamber of a firearm. The bolt carrier includes feed lip channels configured to accommodate the feed lips therein. A cocking surface is located between the feed lip channels and has a width of less than 0.400 inches.

Abstract: A firearm magazine includes a magazine body, with the magazine body having a width to accommodate a double stack of cartridges in a zigzag pattern. The firearm magazine also includes a spring coupled to a follower within the magazine body. The firearm magazine body also includes two feed lips coupled to the magazine body, where the two feed lips together hold a single cartridge in place in a center of the magazine body to allow a bolt to push the single cartridge out of the firearm magazine and into a chamber of a firearm.

Abstract: An easy access alarm mount including a cover having a hinge mechanism and a cover locking mechanism and a base with a hinge mechanism recess and base locking mechanism is provided. The engagement of the hinge mechanism with the hinge mechanism recess and the base locking mechanism with the cover locking mechanism allows the base and cover to be coupled together. The cover may further include a beveled access wand recess to allow an access wand to engage with the cover to allow the cover to be attached or detached by the access wand.

Abstract: Bolt carrier groups (BCGs) for weapon systems are provided herein. The BCG includes a carrier assembly, a bolt assembly, and a gas chamber disposed therebetween. The carrier assembly contains a carrier body that includes a shoulder, a piston surface, and an inlet port. The shoulder is disposed within the carrier body and contains a channel and the piston surface is located on the shoulder at least partially encompassing the channel. The inlet port extends through the carrier body and is configured for receiving propellant gas into the carrier body. The bolt assembly is at least partially contained within the carrier assembly and includes a bolt head opposite of a bolt tail where the bolt tail is at least partially protruding into the channel in the shoulder. The gas chamber is disposed between the carrier body, the piston surface, the bolt tail, and two gas seals disposed on the bolt assembly.

Abstract: An easy access alarm mount including a cover having a hinge mechanism and a cover locking mechanism and a base with a hinge mechanism recess and base locking mechanism is provided. The engagement of the hinge mechanism with the hinge mechanism recess and the base locking mechanism with the cover locking mechanism allows the base and cover to be coupled together. The cover may further include a beveled access wand recess to allow an access wand to engage with the cover to allow the cover to be attached or detached by the access wand.

Abstract: Implementations described herein generally relate to gas operating systems including direct gas impingement systems for a weapon system, such as the AR15, M16, and M4 weapon systems. The gas operating system includes a gas channel carrier rail and a bolt carrier group. The gas channel carrier rail contains a main gas channel disposed between an inlet end an outlet end, where the outlet end is flared to have a larger diameter than the inlet end. A slot is formed in the outlet end and extends along the main gas channel. The bolt carrier group contains a carrier assembly, a bolt assembly, and a gas channel carrier guide, where the bolt assembly is at least partially contained within the carrier assembly. The gas channel carrier guide is disposed on the carrier assembly, extends through the slot, and is at least partially disposed into the gas channel carrier rail.

Abstract: Bolt carrier groups (BCGs) for weapon systems are provided herein. The BCG includes a carrier assembly, a bolt assembly, and a gas chamber disposed therebetween. The carrier assembly contains a carrier body that includes a shoulder, a piston surface, and an inlet port. The shoulder is disposed within the carrier body and contains a channel and the piston surface is located on the shoulder at least partially encompassing the channel. The inlet port extends through the carrier body and is configured for receiving propellant gas into the carrier body. The bolt assembly is at least partially contained within the carrier assembly and includes a bolt head opposite of a bolt tail where the bolt tail is at least partially protruding into the channel in the shoulder. The gas chamber is disposed between the carrier body, the piston surface, the bolt tail, and two gas seals disposed on the bolt assembly.

Abstract: The present disclosure generally relates to extractors for extracting cartridges from firearms, as well as bolts including the extractors, and barrels or barrel extensions configured to receive the bolts and extractors. The extractor includes a support brace having a width greater than 0.095 inches. A barrel extension includes a shortened lug to accommodate an extractor having a support brace with a width greater than 0.095 inches.

Abstract: Implementations described herein generally relate to gas operating systems including direct gas impingement systems for a weapon system, such as the AR15, M16, and M4 weapon systems. The gas operating system includes a gas channel carrier rail and a bolt carrier group. The gas channel carrier rail contains a main gas channel disposed between an inlet end an outlet end, where the outlet end is flared to have a larger diameter than the inlet end. A slot is formed in the outlet end and extends along the main gas channel. The bolt carrier group contains a carrier assembly, a bolt assembly, and a gas channel carrier guide, where the bolt assembly is at least partially contained within the carrier assembly. The gas channel carrier guide is disposed on the carrier assembly, extends through the slot, and is at least partially disposed into the gas channel carrier rail.

Abstract: Aluminum-magnesium alloys are ideal for ship construction; however, these alloys can become sensitized and susceptible to intergranular corrosion when exposed to moderately elevated temperatures. A stabilization treatment has been developed to reverse sensitization and restore corrosion resistance, such that in-service plate can be refurbished rather than replaced. This treatment involves a short exposure to a specific elevated temperature range and can be implemented with portable units onboard a ship.

Abstract: Embodiments of the present invention relate generally to cartridges and modifications for an M16/AR15 rifle. In one embodiment, a modified M16/AR15 rifle or carbine includes a bolt having a maximum outside diameter greater than that of a standard M16/AR15 bolt; and a bolt extractor pivoted to the bolt. The bolt and the bolt extractor are operable to: transport a cartridge from a magazine to a barrel, and eject a spent cartridge from the barrel. The rifle or carbine further includes a barrel extension configured to receive the bolt; a standard M16/AR15 upper receiver coupled to the barrel extension; a standard M16/AR15 lower receiver coupled to the upper receiver.

Abstract: Embodiments of the present invention relate generally to cartridges and modifications for an M16/AR15 rifle. In one embodiment, a modified M16/AR15 rifle or carbine includes a bolt having a maximum outside diameter greater than that of a standard M16/AR15 bolt; and a bolt extractor pivoted to the bolt. The bolt and the bolt extractor are operable to: transport a cartridge from a magazine to a barrel, and eject a spent cartridge from the barrel. The rifle or carbine further includes a barrel extension configured to receive the bolt; a standard M16/AR15 upper receiver coupled to the barrel extension; a standard M16/AR15 lower receiver coupled to the upper receiver.

Abstract: Embodiments of the present invention relate generally to cartridges and modifications for an M16/AR15 rifle. In one embodiment, a modified M16/AR15 rifle or carbine includes a bolt having a maximum outside diameter greater than that of a standard M16/AR15 bolt; and a bolt extractor pivoted to the bolt. The bolt and the bolt extractor are operable to: transport a cartridge from a magazine to a barrel, and eject a spent cartridge from the barrel. The rifle or carbine further includes a barrel extension configured to receive the bolt; a standard M16/AR15 upper receiver coupled to the barrel extension; a standard M16/AR15 lower receiver coupled to the upper receiver.

Abstract: A gas piston system for a firearm includes a gas block having a port in communication with the barrel port and an exhaust tube. The exhaust tube has: a head at least partially disposed in the gas block and having a port in fluid communication with the gas block port; a body extending from the head toward a muzzle of the firearm; and a channel extending from the exhaust tube port through the body. The gas piston system further includes a driver movable relative to the gas block between a forward and rearward position and having: a piston slidable along the gas block; a stinger closing the channel in the forward position and opening the channel in the rearward position, and an operating rod operable to push the bolt carrier assembly away from the barrel.

Abstract: Embodiments of the present invention relate generally to cartridges and modifications for an M16/AR15 rifle. In one embodiment, a modified M16/AR15 rifle or carbine includes a bolt having a maximum outside diameter greater than that of a standard M16/AR15 bolt; and a bolt extractor pivoted to the bolt. The bolt and the bolt extractor are operable to: transport a cartridge from a magazine to a barrel, and eject a spent cartridge from the barrel. The rifle or carbine further includes a barrel extension configured to receive the bolt; a standard M16/AR15 upper receiver coupled to the barrel extension; a standard M16/AR15 lower receiver coupled to the upper receiver.

Abstract: Embodiments of the present invention relate generally to cartridges and modifications for an M16/AR15 rifle. In one embodiment, a modified M16/AR15 rifle or carbine includes a bolt having a maximum outside diameter greater than that of a standard M16/AR15 bolt; and a bolt extractor pivoted to the bolt. The bolt and the bolt extractor are operable to: transport a cartridge from a magazine to a barrel, and eject a spent cartridge from the barrel. The rifle or carbine further includes a barrel extension configured to receive the bolt; a standard M16/AR15 upper receiver coupled to the barrel extension; a standard M16/AR15 lower receiver coupled to the upper receiver.

Abstract: A gas piston system for a firearm includes a gas block having a port in communication with the barrel port and an exhaust tube. The exhaust tube has: a head at least partially disposed in the gas block and having a port in fluid communication with the gas block port; a body extending from the head toward a muzzle of the firearm; and a channel extending from the exhaust tube port through the body. The gas piston system further includes a driver movable relative to the gas block between a forward and rearward position and having: a piston slidable along the gas block; a stinger closing the channel in the forward position and opening the channel in the rearward position, and an operating rod operable to push the bolt carrier assembly away from the barrel.

Abstract: Aluminum-magnesium alloys are ideal for ship construction; however, these alloys can become sensitized and susceptible to intergranular corrosion when exposed to moderately elevated temperatures. A stabilization treatment has been developed to reverse sensitization and restore corrosion resistance, such that in-service plate can be refurbished rather than replaced. This treatment involves a short exposure to a specific elevated temperature range and can be implemented with portable units onboard a ship.

Abstract: Embodiments of the present invention relate generally to cartridges and modifications for an M16/AR15 rifle. In one embodiment, a modified M16/AR15 rifle or carbine includes a bolt having a maximum outside diameter greater than that of a standard M16/AR15 bolt; and a bolt extractor pivoted to the bolt. The bolt and the bolt extractor are operable to: transport a cartridge from a magazine to a barrel, and eject a spent cartridge from the barrel. The rifle or carbine further includes a barrel extension configured to receive the bolt; a standard M16/AR15 upper receiver coupled to the barrel extension; a standard M16/AR15 lower receiver coupled to the upper receiver.

Abstract: One embodiment of the invention sets forth a cartridge design that includes a bullet having a larger diameter than the 0.224 inch bullet currently included in the 223 Remington or 5.56 mm NATO cartridge and a case that has substantially the same base diameter as the case currently included in the 223 Remington or the 5.56 mm NATO cartridge. The overall length of the disclosed cartridge is substantially similar to the overall length as the 223 Remington or the 5.56 mm NATO cartridge.