Abstract: A boresighting system may include a laser boresight device and a parallax mitigation device. The laser boresight device may include a casing for loading into a chamber of a firearm in place of a bolt carrier group, where the casing accepts a laser device for generating a laser beam within an interior cavity of the casing. The parallax mitigation device may include a housing for securing to an optical sight and a central position indicator providing a visual indication of a central position of the optical sight. Boresighting may be provided by adjusting an eye position to view a laser spot on a target associated with the laser beam at the central position of the optical sight based on the central position indicator and adjusting the optical sight to overlap an alignment reference provided by the optical sight with the laser spot at the central position of the optical sight.

Abstract: A device for illuminating BBs emanating from an airsoft gun has a lighting element positioned proximate a breech area of the airsoft gun to illuminate the breech area. A switching device is coupled to the lighting element. A power source is coupled to the switching device and the lighting element.

Abstract: Disclosed herein is a kit for facilitating aligning of twist-in scope rings of firearms. Accordingly, the kit may include a centering component, and a laser pointer. Further, the centering component may be for providing a reference for aligning a twist-in scope ring with a bore of a firearm. Further, the twist-in scope ring may be coupled to a barrel of the firearm. Further, the twist-in scope ring may be rotatable around a scope axis. Further, the centering component may include a primary elongated member and a secondary elongated member attached to the primary elongated member. Further, the laser pointer may be detachably couplable with the twist-in scope ring. Further, the laser pointer may include a laser pointer body configured to be inserted in the twist-in scope ring. Further, the laser pointer may be configured for emitting a laser beam.

Abstract: A plug for an inspection hole of a gas turbine engine is disclosed. The plug may have a stem including a first shaft, wherein a first seal is located circumferentially about the first shaft. The plug may have a swivel seal including a second seal spaced from a ball by a second shaft, and the swivel seal may be rotatably connected to the stem by the ball. The ball and the second seal may be fixed to the second shaft.

Abstract: An improved alignment device and method of use thereof that provides a simple, inexpensive and accurate leveling device that can be used by non-technical people to align a rifle scope to the bore of the rifle and set the vertical crosshair or turret axis plumb to the Earth. The device and method allows the rifle scope to be quickly, conveniently and accurately aligned such that the vertical reticle axis or elevation turret axis is projected through the center of the rifle bore. The device and method can be used to level or plumb a flat surface on the scope by first locating an edge of the device parallel to a flat surface on the rifle scope. The device has a low center of gravity that allows the device to stand inverted, resting on a flat horizontal surface.

Abstract: A boresight verification device (BVD) comprised of a circular housing with a rear portion of smaller diameter and a front portion of larger diameter. The front portion securely holds a level. The circular housing also contains a plurality of spring plungers which grip the inside of a muzzle when BVD is inserted into a muzzle for use. A tooling ball provides a stable reference point.

Abstract: An apparatus and a method for purifying and heating air using photocatalytic oxidation. The apparatus includes a housing, a heater, and a photocatalytic oxidation unit disposed within the housing. The housing defines a flow path for air to move through the apparatus such that air from the environment is drawn into the apparatus and passes over the photocatalytic oxidation unit. A pollutant in the air from the environment adsorbs to a surface of the photocatalytic material coating the plates, and the surface of the photocatalytic material is exposed to ultraviolet light generated by the ultraviolet light source. The energy of the ultraviolet light activates the photocatalytic material, which then breaks down the pollutant leaving non-toxic components and purified air. The air then passes over the heater and back into the environment. A fan is also included to move air through the flow path.

Abstract: A method of boresighting includes providing a weapon including a bore having a centerline axis and a boresight telescope coupled into the bore. The boresight telescope has a beam splitter therein which directs image information received from an aiming reference to an eyepiece of the boresight telescope which is off-axis relative to the centerline axis. A boresight camera accessory (BCA) is removably coupled to the eyepiece. The BCA includes an objective and a photodetector array, wherein the objective focuses the image information from the eyepiece to the photodetector array which generates sensing signals. The sensing signals are automatically transmitted to at least one remote viewer, and a viewable image of the aiming reference is displayed from the sensing signals. The remote viewer individually boresights the weapon using the viewable image and a view of the aiming reference through the bore.

Abstract: A stem or adapter for boresighting weapons includes a first portion having a weapon insertion end including a centering device including a plurality of fingers which compress upon insertion into a bore of a weapon. A second portion has a first end attached to an end of the first portion opposite to the weapon insertion end. The second portion has a coupling end including an attachment feature opposite the first end for attaching another member thereto. The second portion is largely tungsten carbide, and the first portion is formed from a material that is largely not tungsten carbide to provide sufficient flexibility to allow the fingers to spring load when inserted into the bore of the weapon.

Abstract: A rifle scope includes an ocular (6), an objective (4), a reticle (10) and an aligning device (20) that is displaced axially from the reticle and includes one or more markings (22a, 22b) that are visible in use to a shooter. The aligning device (20) is constructed and arranged such that with correct eye alignment the markings (22a, 22b) appear to be aligned with the reticle (10), and with incorrect eye alignment the markings appear to be misaligned with the reticle.

Abstract: The combination of a firearm and a device for aligning an adjustable sight element of an open sight or telescopic sight is disclosed. The combination includes a firearm having a longitudinally extending barrel, a bore extending through the barrel and a longitudinally extending optical axis extending through the bore and an open or telescopic sight with an adjustment mechanism on the barrel of the firearm.

Abstract: An apparatus is provided for traversing a barrel of a gun and disposing at a select position therein. The apparatus includes a bore-rider assembly and a sight-mount assembly. The bore-rider assembly enters a muzzle of the barrel, slides within a bore of the barrel, and anchors to the select position. The sight-mount assembly projects a line-of-sight from the select position to the muzzle. The bore-rider assembly includes a rod having wedges, first and second bore-riders with proximal and distal ends, a sleeve couple that joins at axial ends the bore-riders in tandem from their proximal ends. Each bore-rider has a rim at the distal end and an extension at the proximal end. The rim has an outer diameter adjustable by expansion. The sleeve couple joins in tandem at each axial end each bore-rider from the proximal end. The rod passes through each bore-rider and the couple. The rod includes first and second wedges that engage their corresponding bore-riders.

Abstract: An apparatus and method for aligning and aiming a firearm include a firearm alignment device. In an embodiment, the firearm alignment device includes a reflective surface. The reflective surface provides an image. The firearm alignment device also includes an opening in the reflective surface. A barrel of a firearm is disposable in the opening. In addition, the firearm alignment device includes a removeable band. The removeable band is horizontally disposed on the reflective surface.

Abstract: An apparatus and method are disclosed for determining a proper firearm fit for a user. In an embodiment, a firearm alignment device is disclosed. The firearm alignment device comprises a reflective surface and an opening. In addition, the firearm alignment device includes a band. The band may be horizontally disposed on the reflective surface.

Abstract: An apparatus and method are disclosed for determining a proper firearm fit for a user. In an embodiment, a firearm alignment device is disclosed. The firearm alignment device comprises a reflective surface and an opening. In addition, the firearm alignment device includes a band. The band may be horizontally disposed on the reflective surface.

Abstract: A firearm bore sighting system is described for in-line muzzle loaders which include a breach plug, the bore sighting system rotating into the breach plug threads and which may include a stop to locate the bore sighting system relative to the breach.

Abstract: An optical collimator device, for use in aligning a riflescope with the bore of the rifle, is formed using a small aperture lens for viewing a reticule through a prismatic assembly. The collimator is magnetically attached to the muzzle of the rifle, and when a target is viewed through the riflescope the image of the reticule and the riflescope cross wires are seen simultaneously with the image of the target.

Abstract: An optical collimator device, for use in aligning a riflescope with the bore of the rifle, is formed using a small aperture lens for viewing a reticule through a prismatic assembly. The collimator is magnetically attached to the muzzle of the rifle, and when a target is viewed through the riflescope the image of the reticule and the riflescope cross wires are seen simultaneously with the image of the target.

Abstract: A bore sighting apparatus is designed to releasably fit into the muzzle of the barrel of a firearm for use in bore sighting of the firearm. The bore sighter includes a housing for a collimated light source, such as a laser, with an aperture for projecting the collimated light from a first end. The second end of the housing is coupled to a down-tapered, conical section which terminates in its tip at an elongated cylindrical extension for insertion into the barrel of a firearm. The elongated extension has an external diameter which is less than the smallest caliber of firearm with which the device is to be used. An O-ring on the extension is designed to frictionally center the extension within the barrel. The device is inserted until interference with the down-tapered portion and the muzzle of the firearm occurs to center the device. Rare earth magnets are included in the down-tapered portion for holding the bore sighter firmly in the muzzle of the firearm while the bore sighting operation is effected.

Abstract: A gun tube cailibrator comprises a calibration lens, a sliding seat connected to the of the calibration lens, one side thereof is formed with a teeth track, and the center portion thereof is disposed with a vertical sliding groove for being locked horizontally by screws. The block is a rectangular body. and a side of the block near the sliding seat is formed with a respective teeth track engaged with the teeth track of the sliding seat, while the center thereof is installed with an axial hole. The lower end thereof is locked vertically by a fixing screw; An elastomer is installed between the teeth track of the block and the track of the sliding seat. A straight pin is inserted into a through hole in the center of the block and a fixing screw serves to the fixed the lower end thereof. Thus, the telescopic gun sight lens of different sizes can be suited.