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 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 boresight device includes a casing designed to be loaded into a chamber of a firearm in the place of a bolt carrier group. The casing may include one or more keyed features to engage with corresponding components of the firearm such that the one or more keyed features align an exit port in the casing to a barrel of the firearm upon loading of the casing into the chamber. The boresight device may further include a laser device for generating a laser beam. The laser device is positioned within the casing to direct the laser beam through the exit port of the casing and along an axis of the barrel when the casing is loaded into the chamber.

Abstract: A parallax mitigation device and method is disclosed. The parallax mitigation device can be used in a reflex sight having a front portion for receiving light and a rear portion for providing a visual of a target and a projection of an aiming point superimposed on the visual to a user. The parallax mitigating device is placed at one of: the front portion, the rear portion, or in an optical path between the front and rear portion of the reflex sight. The parallax mitigating device is configured for indicating a center of the visual provided to the user to facilitate parallax mitigation of the reflex sight.

Abstract: A device for mitigating parallax in a reflex sight. The reflex sight having a front portion for receiving light and a rear portion for providing a visual of a target to a user. The parallax mitigation device defines a reticle positioned in an optical path of the reflex sight. The reticle is configured to indicate a center of the visual provided to the user.