A rear sight comprises a base member and a top member. The base member comprises a fitting portion and a base member bearing surface. The fitting portion of the base member is attachable to a firearm. The top member comprises a rear sight alignment portion and a top member bearing surface. The top member bearing surface is slidably engageable with the base member bearing surface for pivotable movement of the top member relative to the base member between lowered and raised positions. Movement of the top member away from the lowered position and toward the raised position increases the distance between the rear sight alignment portion and a barrel axis of the firearm to thereby adjust the elevation of the rear sight alignment portion of the rear sight.

A configurable sight for a firearm is provided including a plunger that is coaxially disposed within a bore of a sight element and a bias element that biases the sight element to an upright position, where the plunger selectively interlocks in the bore in different orientations to secure the sight in different positions, such as an upright position or a down position. The plunger can be slidably locked and unlocked relative to the sight element on a longitudinal axis, and the sight element can be rotated about the same axis. The sight element bore can be defined by a sleeve fixedly mounted in the sight element, and that sleeve can include a slotted crown that selectively engages the plunger depending on the position of the sight element to lock the sight element in position. A related method is provided.

A configurable sight for a firearm is provided including a plunger that is coaxially disposed within a bore of a sight element and a bias element that biases the sight element to an upright position, where the plunger selectively interlocks in the bore in different orientations to secure the sight in different positions, such as an upright position or a down position. The plunger can be slidably locked and unlocked relative to the sight element on a longitudinal axis, and the sight element can be rotated about the same axis. The sight element bore can be defined by a sleeve fixedly mounted in the sight element, and that sleeve can include a slotted crown that selectively engages the plunger depending on the position of the sight element to lock the sight element in position. A related method is provided.

A rotational sighting apparatus includes a base, an aiming member and a pressing pivotal axle. The base includes a main body, a side cover and a through hole formed on the side cover. The side cover further includes a locking portion adjacent to the through hole. The aiming member includes a rotating portion and a pivotal attachment hole formed to penetrate through the rotating portion. The pressing pivotal axle penetrates through the pivotal attachment hole to connect with the rotating portion via the through hole. The pressing pivotal axle includes a locking key moveably locked onto the locking portion and an elastic element configured to drive the pressing pivotal axle to rotate. Accordingly, when the locking key disengages from the locking portion, the elastic element drives the pressing pivotal axle to allow the aiming element to rotate from a first position to a second position.

A multi-function gunsight for aiming a firearm comprises a body and a sight arm pivotally coupled to the body for rotation between a stowed orientation and a deployed orientation. The body defining a laser cavity, a starboard cavity, and a port cavity. A laser housing is disposed inside the laser cavity defined by the body. The laser housing supports a semiconductor chip that emits laser light and a collimating lens that collimates the laser light emitted by the semiconductor chip. A forward end of the laser housing is coupled to a spherical bearing. The spherical bearing constrains movement of the laser housing in three translation degrees of freedom corresponding to translation along x, y, and z axes of an x-y-z coordinate system. The spherical bearing allows rotation of the laser housing about at least the x and y axes of the x-y-z coordinate system.

A multi-function gunsight for aiming a firearm comprises a body and a sight arm pivotally coupled to the body for rotation between a stowed orientation and a deployed orientation. The body defining a laser cavity, a starboard cavity, and a port cavity. A laser housing is disposed inside the laser cavity defined by the body. The laser housing supports a semiconductor chip that emits laser light and a collimating lens that collimates the laser light emitted by the semiconductor chip. A forward end of the laser housing is coupled to a spherical bearing. The spherical bearing constrains movement of the laser housing in three translation degrees of freedom corresponding to translation along x, y, and z axes of an x-y-z coordinate system. The spherical bearing allows rotation of the laser housing about at least the x and y axes of the x-y-z coordinate system.

A firearm sight, optionally having a 45 offset mount, including a sight element selectively configurable in upright position and down positions, and a moveable plunger configurable in a locking mode in which a head of the plunger protrudes from it such that upon rotation of the sight element about a pivot axis, the head engages a plunger wall of the mount to arrest such rotation to thereby maintain the sight element substantially in the upright position, the plunger alternatively configurable in a free mode in which the head is retracted into the sight element so the head clears the plunger wall and the sight element can move to the down position. The mount can include an extension stop wall adjacent the head so the head cannot be deployed from the sight element to maintain it in the down position. The plunger can be actuated ambidextrously. A related method is provided.

An alignment mechanism uses two adjustment plates. A first adjustment plate is pivotal about a first adjustment axis and a second adjustment plate is rotatable about a second adjustment axis. The first and second adjustment axes are perpendicular to one another. The first plate has a front portion through which the first adjustment axis passes and a rear portion having a first alignment surface and a tension spring secured to the rear portion opposite the first alignment surface. The second adjustment plate has a front portion and a rear portion having a second alignment surface and a tension spring secured between the second alignment surface and the rear portion of the first adjustment plate.

An alignment mechanism uses two adjustment plates. A first adjustment plate is pivotal about a first adjustment axis and a second adjustment plate is rotatable about a second adjustment axis. The first and second adjustment axes are perpendicular to one another. The first plate has a front portion through which the first adjustment axis passes and a rear portion having a first alignment surface and a tension spring secured to the rear portion opposite the first alignment surface. The second adjustment plate has a front portion and a rear portion having a second alignment surface and a tension spring secured between the second alignment surface and the rear portion of the first adjustment plate.

A cowitness sight configured to mount on a red dot sight, including a base, where two rear tubes are mounted to the top of the base, the base is secured to the red dot sight, the base further includes at least one bore hole housing, and the base is secured to the red dot sight using at least one elongated fastener passing through the at least one bore hole housing. A method of installing a cowitness sight on a red dot sight, including placing the cowitness sight with two rear tubes on a red dot sight, and securing the cowitness sight to the red dot sight using at least one elongated fastener.