Apr 28, 2026

US12613079 - Boresight device, firearm calibration system, and method

A boresight device for calibrating a firearm and insertable into a chamber of the firearm. The boresight device includes a housing, a light-emitting assembly, and a magnet. A boresight device for calibrating a firearm is insertable into a chamber of the firearm. The housing is configured to be placed in the chamber of the firearm, the housing defines an emitting surface at a first end. The light-emitting assembly is received in the housing and is configured to emit a light beam out of the firearm when the housing is placed in the firearm. The magnet is attached to the housing. The magnet is positioned to magnetically engageable with a portion of the firearm, and the magnet is movable relative to the chamber.

Assignee: Beijing Huihaozi Technology Co., Ltd.
Inventors: Huicai Li
Filing date: 2025-07-23

boresightfirearmcalibrationdevice

The patent describes a boresight device designed for calibrating firearms, which can be inserted into the firearm’s chamber and features a light-emitting assembly to project a beam. Additionally, it includes a magnet that allows the device to engage with the firearm, ensuring it moves in tandem with the firing end when the firearm is operated.

Claim 1

1 . A boresight device configured for calibrating a firearm, insertable into a chamber of the firearm, the boresight device comprising: a housing configured to be placed in the chamber of the firearm, the housing defining an emitting surface at a first end; a light-emitting assembly received in the housing and configured to emit a light beam out of the firearm when the housing is placed in the firearm; and a magnet attached to the housing, wherein the magnet is positioned to magnetically engageable with a portion of the firearm, and the magnet is movable relative to the chamber; and wherein the magnet is positioned on a rear end of the housing and is configured to magnetically engage with the firing end of the firearm such that when the firing end moves away from the chamber, the boresight device moves together with the firing end thereby moving the boresight device out of the chamber. a housing configured to be placed in the chamber of the firearm, the housing defining an emitting surface at a first end; a light-emitting assembly received in the housing and configured to emit a light beam out of the firearm when the housing is placed in the firearm; and a magnet attached to the housing, wherein the magnet is positioned to magnetically engageable with a portion of the firearm, and the magnet is movable relative to the chamber; and wherein the magnet is positioned on a rear end of the housing and is configured to magnetically engage with the firing end of the firearm such that when the firing end moves away from the chamber, the boresight device moves together with the firing end thereby moving the boresight device out of the chamber.

Google Patents

https://patents.google.com/patent/US12613079

USPTO PDF

https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/12613079