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 firearm grip configured to be held or gripped by a user of the firearm. The firearm grip includes a grip body and a grip insert. The grip body has a first end and a second end opposite the first end. The first end can mate with a surface of the firearm when the firearm grip is installed on the firearm. The second end has a void that can receive and accommodate the grip insert therein. The grip insert includes a first lock and a second lock. When in a first position, the first lock locks the grip insert in the void of the grip body. When in a second position, the first lock unlocks the grip insert such that the grip insert is removable from the grip body. The second lock is configured to lock the first lock in the first position.

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 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: .An apparatus implementable on a firearm includes a grip frame, a slide assembly, a trigger control unit, and a rail module. The trigger control unit is removably receivable in the grip frame and installed between the grip frame and the slide assembly such that, when operated, the trigger control unit causes firing of one or more rounds of ammunition. The rail module is configured to be installed between the trigger control unit and the grip frame to aid in securing the trigger control unit to the grip frame.

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 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 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: 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 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.