Abstract: A foldable sight implementable on a firearm includes a base, a hinge and a sight body. The base is configured to be mounted on a portion of the firearm. The sight body is pivotably attached to the base by the hinge and contains a position holding device therein. The position holding device is configured to hold the sight body at either a first position or a second position responsive to the sight body being rotated from one of the first and second positions to another of the first and second positions.

Abstract: A device implementable on a firearm includes a plate with a first primary side and a second primary side opposite the first primary side. When installed with the first primary side facing the firearm or an accessory of the firearm: (i) the first primary side is directly mounted on a portion of the firearm or the accessory, and (ii) the second primary side accommodates and mates with a first optic when the first optic is mounted on the second primary side of the plate. When installed with the second primary side facing the firearm or the accessory of the firearm: (i) the second primary side is directly mounted on the portion of the firearm or the accessory, and (ii) the first primary side accommodates and mates with a second optic different from the first optic when the second optic is mounted on the first primary side of the plate.

Abstract: A device implementable on a firearm includes a monolithic upper receiver, comprising an upper receiver portion and a handguard portion, which is configured to accommodate non-proprietary barrel assemblies dimensioned according to United States military standard (mil-spec) barrel assembly dimensions and non-proprietary bolt carrier groups (BCGs) dimensioned according to mil-spec BCG dimensions. The device also includes a charging handle assembly configured to be coupled to an operating rod of a gas system of the firearm and forward of a BCG of the firearm. The device further includes a barrel locking system including a locking plate and a locking screw. When the locking screw is screwed into a threaded hole on the locking plate, the locking plate engages with a side of a barrel extension of the barrel assembly in a radial directions perpendicular to a longitudinal axis of the barrel assembly.

Abstract: A firearm muzzle attachment mechanism includes a muzzle device; a tapering adapter having an outer tapering end configured to connect with the muzzle device; a hollow adapter having an internally threaded portion and configured to receive the muzzle device; a muzzle attachment having an inner tapering end configured to connect with the outer tapering end of the tapering adapter; and a means for providing tension being received in a receiving slot formed on the muzzle attachment.

Abstract: A apparatus implementable on a firearm includes a handguard assembly which is configured to at least partially surround a barrel of the firearm when the handguard is installed on the firearm. The handguard includes at least first and second physical features such that: (a) the first physical feature is configured to accommodate mounting of an accessory of the firearm on the handguard, and (b) the second physical feature is configured to secure a cable of the accessory onto the handguard.

Abstract: A firearm launcher for holding a projectile includes a launcher body attached to a firearm barrel; and a tension member cooperated with the launcher body. In one embodiment, the tension member is connected with the projectile.

Abstract: A apparatus implementable on a firearm includes a handguard assembly which is configured to at least partially surround a barrel of the firearm when the handguard is installed on the firearm. The handguard includes at least first and second physical features such that: (a) the first physical feature is configured to accommodate mounting of an accessory of the firearm on the handguard, and (b) the second physical feature is configured to secure a cable of the accessory onto the handguard.

Abstract: A device implementable on a firearm includes a housing, a connection portion and a support portion. The housing is configured with a void therein and has a first end and a second end opposite the first end. The connection portion is disposed at the first end of the housing and configured to couple the device to the firearm. The support portion is configured to be received in the void of the housing and, responsive to being pressed from two opposite sides, can retractably extend out of the void of the housing through an opening at the second end of the housing to form a bipod.

Abstract: A apparatus implementable on a firearm includes a handguard assembly which is configured to at least partially surround a barrel of the firearm when the handguard is installed on the firearm. The handguard includes at least first and second physical features such that: (a) the first physical feature is configured to accommodate mounting of an accessory of the firearm on the handguard, and (b) the second physical feature is configured to secure a cable of the accessory onto the handguard.

Abstract: A firearm muzzle attachment mechanism includes a muzzle device; a tapering adapter having an outer tapering end configured to connect with the muzzle device; a hollow adapter having an internally threaded portion and configured to receive the muzzle device; a muzzle attachment having an inner tapering end configured to connect with the outer tapering end of the tapering adapter; and a means for providing tension being received in a receiving slot formed on the muzzle attachment.

Abstract: A height-adjustable optics mount includes a lower base attachable to the firearm including an angled platform having a plurality of male guiding teeth and located on the lower base; and an upper base which is operable between a slidable position where the upper base is sliding along the plurality of the male guiding teeth and a static position where the upper base is affixed on at least one of the plurality of male guiding teeth.

Abstract: An apparatus implementable on a firearm includes a lens, a light source, a control unit coupled to control the light source to project an image of an aim point onto the lens, and a housing structure that houses the lens, the light source, and the control unit, with a portion of the housing structure forming a shroud that surrounds the lens. The lens includes an ultraviolet (UV)-sensitive lens that darkens responsive to sensing a UV light. Alternatively, or additionally, the shroud is sensitive to the UV light and a color of the shroud darkens responsive to sensing the UV light.

Abstract: A device implementable on a firearm includes an adjustable multi-angle grip. The grip includes an upper portion and a lower portion. The upper portion is configured to be coupled to a receiver portion of the firearm. The lower portion is pivotably coupled to the upper portion via a hinge on a front side of the grip such that an angle between a longitudinal axis of the lower portion and a longitudinal axis of a barrel of the firearm is variable.

Abstract: A device implementable on a firearm includes a monolithic upper receiver, comprising an upper receiver portion and a handguard portion, which is configured to accommodate non-proprietary barrel assemblies dimensioned according to United States military standard (mil-spec) barrel assembly dimensions and non-proprietary bolt carrier groups (BCGs) dimensioned according to mil-spec BCG dimensions. The device also includes a charging handle assembly configured to be coupled to an operating rod of a gas system of the firearm and forward of a BCG of the firearm. The device further includes a barrel locking system including a locking plate and a locking screw. When the locking screw is screwed into a threaded hole on the locking plate, the locking plate engages with a side of a barrel extension of the barrel assembly in a radial directions perpendicular to a longitudinal axis of the barrel assembly.

Abstract: A device implementable on a firearm includes a monolithic upper receiver, comprising an upper receiver portion and a handguard portion, which is configured to accommodate non-proprietary barrel assemblies dimensioned according to United States military standard (mil-spec) barrel assembly dimensions and non-proprietary bolt carrier groups (BCGs) dimensioned according to mil-spec BCG dimensions. The device also includes a charging handle assembly configured to be coupled to an operating rod of a gas system of the firearm and forward of a BCG of the firearm. The device further includes a barrel locking system including a locking plate and a locking screw. When the locking screw is screwed into a threaded hole on the locking plate, the locking plate engages with a side of a barrel extension of the barrel assembly in a radial directions perpendicular to a longitudinal axis of the barrel assembly.

Abstract: A cover kit for a firearm handguard having a plurality of slots, the cover kit includes a bottom side detachably mounted on the slot of the firearm handguard; fastening means for securing the cover body to cover the slot on the firearm handguard; a cable secured between the bottom side of the cover body and the firearm handguard; wherein the bottom side comprises a plurality of horizontal tunnels and a plurality of transversal tunnels intersected with the transversal tunnels; wherein the cable is embedded in at least one of transversal tunnel and/or the horizontal tunnels.

Abstract: A cable management assembly for attachment to a rail of a firearm may include a main body having a bottom surface; a plurality of grooves formed on the bottom surface; a cable selectively embedded within the plurality of the grooves; wherein one of the plurality of grooves is communicated with the other one of the plurality of grooves.

Abstract: An adjustable spent cartridge casing deflector includes a deflector body directly attached on the firearm; wherein the deflector body includes a front side having a deflecting surface facing an expected trajectory of spent cartridge casings and being near an ejection port; wherein the deflector body is rotatably arranged on the firearm via an adjustable axis to adjust a direction of the deflecting surface; wherein the adjustable axis is configured to be rotated for selectively tightening or untightening the deflector body mounted on the firearm.

Abstract: A firearm magazine for storing and dispensing cartridges including an elongated housing defining a cartridge chamber, the housing having a distal end comprising a tapered interior space and a pair of guiding lip, a proximal end formed at an opposite side of the distal end, side walls comprising a first side wall, a third side wall, a second side wall integrally extended between the first and third side wall, and a fourth side wall integrally extended between the first and the third side wall, each of the side walls extending between the distal end and the proximal end; an outermore shell seamlessly molded over an outer face of the housing; wherein the housing comprises a plurality of witness holes formed on at least one of the side walls or formed on all of the side walls;