Abstract: Centuries back, guns were means of hunting. Today, these guns fall into the hands of mentally unstable people, causing random acts of violence such as school shootings. There is no meaningful legislation from the government, despite shootings like Sandy Hook and Uvalde. The proposed apparatus will alert the responsible parties when a firearm is in the vicinity of schools and then produce a loud broadcast to deter the perpetrator. The apparatus uses a GPS module that can track the geolocation of the firearm concerning sensitive areas such as schools. The apparatus configures a safety zone, which if breached activates the alert mechanism. These early alerts will provide all the information to schools and local law enforcement to take immediate action and prevent the incident. Tracking, detection, early alerts, and deterrence are the key elements of my apparatus. Hopefully, these safety features can also drive improvement in design of new guns.

Abstract: The techniques described herein relate to methods and apparatus for firearm safety mechanisms, visual safety indicators, and related techniques. A firearm includes a handle comprising one or more buttons disposed at least partially within a surface of the handle, such that the one or more buttons can be in contact with an operator's hand when the operator grasps the handle; a safety mechanism in mechanical communication with the trigger. The safety mechanism comprises: a first position that blocks actuation of the trigger; and a second position that does not block actuation of the trigger; and at least one processor configured to: upon determining an input code matches a stored code, transmits a signal to the safety mechanism to change the safety mechanism from the first position to the second position so that the firearm can be fired by the operator.

Abstract: The techniques described herein relate to methods and apparatus for firearm safety mechanisms, visual safety indicators, and related techniques. A firearm includes a handle comprising one or more buttons disposed at least partially within a surface of the handle, such that the one or more buttons can be in contact with an operator's hand when the operator grasps the handle; a safety mechanism in mechanical communication with the trigger. The safety mechanism comprises: a first position that blocks actuation of the trigger; and a second position that does not block actuation of the trigger; and at least one processor configured to: upon determining an input code matches a stored code, transmits a signal to the safety mechanism to change the safety mechanism from the first position to the second position so that the firearm can be fired by the operator.

Abstract: A firearm locking system includes a magazine plug assembly and a locking bracket. The magazine plug assembly has an outer body configured to fit within a magazine well of a firearm and includes a locking plate and a locking mechanism both partially contained within the outer body. The locking mechanism includes a locking bar configured to partially extend into a barrel of the firearm when an actuatable end of the locking bar is pressed upon by a base panel of the locking bracket. This action occurs when the locking bracket is secured to the base of the magazine plug assembly by inserting an external portion of the locking plate into a cooperatively sized slot within the locking bracket and then inserting a padlock shackle into an opening within the external portion of the locking plate.

Abstract: A firearm holster for securely enclosing a firearm is provided. A spring biased triggering lever is pivotally secured to the holster. A slider attached to the firearm holster slides on the slider base from a locked position to an unlocked position upon pressing the triggering lever. A spring-biased resettable drop lock is pivotally connected to a resettable drop lock mount attached to the holster and extends into an ejection port of a firearm secured in the firearm holster. The resettable drop lock pivots out of the ejection port of the firearm in the firearm holster by contact with the slider as the slider moves from a locked position into an unlocked position. A secondary lock includes a helical lock shaft disposed within a secondary lock body and extends from the lock body to rotate a secondary lock from a locked position to an unlocked position.

Abstract: The present disclosure provides systems and techniques for authenticating a user at gun. The gun may include an authentication manager capable of implementing logic, processing signals, or executing instructions. The authentication manager may receive first query data from a first authentication sensor of the gun, receive second query data from a second authentication sensor of the gun, perform an authentication procedure to determine whether the first query data or the second query data matches enrollment data, where a match is determined based on the first query data or the second query data and the enrollment data satisfying a similarity threshold. The authentication manager may determine that the user is authorized to operate the gun and transmit a signal in response to the determining that the user is authorized to operate the gun. The signal may cause the gun to enter an active state which allows the gun to be fired.

Abstract: A firearms cartridge is provided which is equipped with a signal receiver. The signal receiver is operable to disable the firearm when it received a predetermined signal, such as a signal on the electromagnetic spectrum, acoustic signal, and the like. When the signal is not present, the firearm cartridge works like a traditional unrestricted firearm cartridge allowing a firing of the weapon.

Abstract: An external lock apparatus for a gun includes a gun receptacle. The gun receptacle is configured to receive a portion of the gun. An external lock is configured to engage with the portion of the gun when the gun is inserted into the gun receptacle. The external lock has on OPEN position and a LOCKED position. The external lock further includes an interference member. The interference member is configured to engage with the gun such that the gun cannot be removed from the gun receptacle and the gun cannot fire when the portion of the gun is received within the gun receptacle and the external lock is in the LOCKED position. In the alternative, the gun cannot be fired but can be removed from the gun receptacle if the portion of the gun is received within the gun receptacle and external lock is in the OPEN position.

Abstract: A weapon system for a firearm includes a processor, the processor having an associated memory, and an optical reader, the optical reader configured to receive operator-identification information and transmit the operator-identification information to the processor.

Abstract: A safety device arrangement for a firearm with a magazine well comprising an insert (3A) adapted to the dimensions and shape of the magazine well and being lockable therein and a rack element (4A) for carrying the firearm, the body of the insert (5A) exposed from the magazine well being adapted in dimensions and shape to fit against the carrier part (17) of the rack element, is characterised in that the carrier part of the rack element is provided with an opening, slot or equivalent (18) and the body of the insert exposed from the magazine well provided with a hollow protrusion (7) adapted to fit to said opening, slot or equivalent and extended through and outside of the carrier part, and on the other hand opening inside the body, and that in the locking mechanism between the insert and the magazine well essential bar or equivalent (9) with its accessories (10, 11, 12) extending inside the insert is implemented to depart from and being lockable in said protrusion.

Abstract: A system and method for managing one or more firearms having an authentication device is described. The method may receive a profile of one or more firearm users. The profile of the one or more firearm users may be registered to access one or more authentication devices coupled to one or more firearms. A usage of the one or more firearms coupled to the authentication devices may be tracked via the profile of the firearm user. The system can include a central server, a secure management station with a secure application, a docking station, a respective firearm lock or authentication device for each firearm and an enrollment station, each communicating in a secure manner, to globally manage a plurality of firearms.

Abstract: Systems and methods are provided for the making safe of a handgun. A safety system includes a lock mechanism coupled to an engagement member and a user interface. The engagement member is movably coupled to the handgun and includes a contact face that is in contact with the slide of the handgun. The engagement member transfers a portion of a force to the slide and moves between a lock position and an unlock position. The lock position corresponds to a separation distance between a distal end of a primer actuator of the handgun and a primer activation plane. The engagement member is configured to transition between the lock position and the unlock position while remaining movably coupled to the handgun. Movement of the engagement member from the lock position is restricted by the lock mechanism until disengaged via the user interface.

Abstract: Holster, support and anchorage quick release system for guns that comprises left and right assembly parts configured to guide the gun when holstered, a trigger guard ratchet, a release button and a locking mechanism, wherein the left and right assembly parts configure a holster that is laterally opened where, once the gun is holstered, the muzzle and the full length of the barrel remain leaning outwards, the holstering of the gun activates the ratchet when yielding under the insertion of the trigger guard, locking the gun in the holster and the release of the gun is produced by the actuation on the locking mechanism and the release button, so that the drawing of the gun is performed perpendicularly to the barrel, allowing to aim from the very first instant of the release of the gun, avoiding unneeded movements and providing a shooter with more time.

Abstract: A system and method for a programmable trigger device for a firearm, capable of situational awareness providing intelligent contextual data related to projectile management to a downstream firing device. In particular, a smart trigger system that evaluates targets in line-of-fire, estimated target age, estimated target distance, and other contextual data that is then passed along to a programmable device. The device, as provided by the consumer of this invention, may make the determination then whether to eject or prevent ejection of a bullet after the trigger is activated, firing an alternative shot based on environmental factors of which the device is aware, or other activations or deactivations as seen fit.

Abstract: The present disclosure provides techniques, systems, and devices that support indicating gun state information. One or more electronic components may be used to indicate the gun state information, and the electronic components may be coupled with a gun. The gun may identify a state of the gun based on a compute component including a data signal, and the compute component may be coupled with the gun. The gun may select a representation of the state of the gun, where the representation of the state of the gun is compatible with an electronic component coupled with the gun. The gun may indicate, at the electronic component and based on the compute component, the state of the gun with the representation of the state of the gun. Indicating the state of the gun may include displaying an icon, illuminating the electronic component with a color, or pulsating the electronic component.

Abstract: A smart home system with firearm tracking includes a sensor network installed within a building and a control panel including an input mechanism, a display screen, a wireless transceiver, and a scanning mechanism. The system is configured to monitor at least one firearm that has an ammunition sensor, a GPS sensor, a wireless transceiver, and a magazine having a unique scannable QR code. The control panel receives user identification information via the input mechanism or an external remote device, generates a user profile that includes the identification information, scans the unique QR code of the firearm magazine, assigns the magazine to a selected user profile, and receives an ammunition count from the firearm as detected by the ammunition sensor. The system can send location and ammunition change notifications to the control panel display, external user devices, and emergency authorities to enhance the safety of the firearm user and general public.

Abstract: Disclosed is chamber flag for a firearm. In one example the chamber flag has a body portion extending along a central axis and a chamber portion extending axially from the body portion, where the chamber portion is sized and configured to be received in a chamber of the firearm. A flag portion extends from the flag body in a direction transverse to the central axis. An arm is connected to the body portion and extends circumferentially around a left side of the body portion in a radially spaced relationship with the body portion, where at least the arm is made of a flexible and resilient material.

Abstract: A firearm holster for securely enclosing a firearm is provided. A spring biased triggering lever is pivotally secured to the holster. A slider attached to the firearm holster slides on the slider base from a locked position to an unlocked position upon pressing the triggering lever. A spring-biased resettable drop lock is pivotally connected to a resettable drop lock mount attached to the holster and extends into an ejection port of a firearm secured in the firearm holster. The resettable drop lock pivots out of the ejection port of the firearm in the firearm holster by contact with the slider as the slider moves from a locked position into an unlocked position. A secondary lock includes a helical lock shaft disposed within a secondary lock body and extends from the lock body to rotate a secondary lock from a locked position to an unlocked position.

Abstract: The present disclosure provides a Bluetooth operated lock for a trigger or a sheath. It is designed to limit the users' access to the use of the firearm. The only way to release the lock is through a wireless signal from a cell phone or another remote device. The disclosure includes a band having a first end and a second end configured to form a continuous loop around a firearm handle inside or outside the trigger. The disclosure also includes a locking mechanism connecting the first end and the second end which is operable via a wireless signal. The disclosure additionally includes a blocking mechanism on the band and configured to block a depression of the trigger and operable via the locking mechanism. The disclosure further includes a safety button on the band configured to engage the blocking mechanism when depressed and released via the wireless signal.

Abstract: The present invention relates to a pistol comprising a firing pin safety device integrated into a slide (5) of the pistol comprising a firing pin (1) comprising a lateral extension (25) comprising at least one safety lug (10,11) and a firing pin butterfly safety (2) positioned on an axis of rotation (27) fastened to the slide and parallel to the axis of translation of the firing pin (20), said butterfly safety (2) being able to rotate in a vertical plane between a firing position and a blocking position, said butterfly (2) comprising at least one bearing surface (17,18) on which the at least one lug (10,11) rests when said butterfly is in the blocking position and at least one recess (14) able to allow the at least one lug (10,11) to pass when said butterfly is in the shooting position, the center of mass of said butterfly (2) being on its axis of rotation (27) and the axis of rotation (27) being a main axis of inertia of said butterfly (2).

Abstract: A tracker for a firearm comprises a device capable of being secured to a Picatinny® rail of a firearm. The device is in wireless communication with a smart electronic device thereby alerting a user of when the firearm has been moved. The device also comes with an audio alert which issues forth a high decibel and painful sound to dissuade unauthorized use.

Abstract: A handgun safety device comprising a safety element with a firing interrupting element configured for snug projection between a face of a duty cartridge and a fore end of a functional firing element, said safety element being articulated at a first end of a cord having a full length, with a second end configured for attaching to an article worn by a user.

Abstract: Apparatus and associated methods relate to a firearm lock configured to release a self-hardening interlock fluid into a firing chamber of a firearm in response to a predetermined force. In an illustrative example, the firearm lock may include an engagement module configured to releasably couple to a firing chamber of the firearm. In a locked mode, for example, the engagement module may prevent the firearm from firing. The firearm lock may include, for example, a tamper interlock module containing interlock material (IM) in a fluid state. When a predetermined force is applied to the tamper interlock module, for example, the IM may be dispensed from the cavity into the firing chamber and the IM may at least partially transition into a solid state such that the IM prevents the firearm from firing. Various embodiments may advantageously disable a locked firearm in response to tampering with the lock.

Abstract: One aspect includes a smart-gun configured to communicate with user device via a communication network. The smart-gun can be configured from an unlocked configuration where the smart-gun is operable to fire, to a locked configuration where the smart-gun is inoperable to fire, the configuring to the locked configuration in response to a locking signal; and configured from the locked configuration where the smart-gun is inoperable to fire, to the unlocked configuration where the smart-gun is operable to fire, the configuring to the unlocked configuration in response to an unlocking signal.

Abstract: A universal firearm tracking system includes a tracking module enclosed in a housing; a cable attached to the housing configured to attach the housing to a firearm; and a hanging tamper-proof warning label connected to a bottom of the housing by a wire. The tracking module includes GPS tracking and RFID Tags.

Abstract: A firearm holster for securely enclosing a firearm is provided. A spring biased triggering lever is pivotally secured to the holster. A slider attached to the firearm holster slides on the slider base from a locked position to an unlocked position upon pressing the triggering lever. A spring-biased resettable drop lock is pivotally connected to a resettable drop lock mount attached to the holster and extends into an ejection port of a firearm secured in the firearm holster. The resettable drop lock pivots out of the ejection port of the firearm in the firearm holster by contact with the slider as the slider moves from a locked position into an unlocked position. A secondary lock includes a helical lock shaft disposed within a secondary lock body and extends from the lock body to rotate a secondary lock from a locked position to an unlocked position.

Abstract: Methods, systems, and apparatus, including computer programs encoded on a computer storage medium, for implementing a weapon manager are disclosed. In one aspect, a method includes the actions of determining, by the server, that the weapon is in a particular location. The actions further include determining, by the server, a projected travel path of the weapon. The actions further include, based on determining that the weapon is in a particular location and the projected travel path of the weapon, generating, by the server, an instruction to disable the weapon. The actions further include providing, for output to the weapon, the instruction to disable the weapon.

Abstract: A ballistic deflection device including a backing plate configured to be attached to a holster, a ballistic deflection section coupled to a bottom portion of the backing plate, wherein the ballistic deflection section includes a first side wall, a second side wall projecting, and rear wall, wherein the rear wall is defines a non-zero angle with respect to the backing plate.

Abstract: A firearm, the firearm comprising: a grip; a transparent window located on the rear of the grip; at least one electromagnetic sensor located within the grip, and configured to receive electromagnetic radiation from outside of the grip through the transparent window; a computing device located in the grip and in communication with the LED and the electromagnetic sensor; where the electromagnetic sensor is configured to detect incoming electromagnetic radiation traveling through the transparent window from outside of the grip; and the computing device is configured to allow the firearm to fire if the computing device determines that the incoming electromagnetic radiation corresponds to an authorized user for the firearm.

Abstract: A firearm inhibiting device and method of using the same is disclosed which will only mount onto the firearm if the firing chamber is empty of ammunition (a live cartridge). Further inhibiting, for handguns the device prevents operation of the gun's action mechanism. Further inhibiting, for long-guns the device prevents a live cartridge from entering the firing chamber. The empty chamber indication is unique in that it will indicate an empty firing chamber while the action is prevented from operation and in the battery position.

Abstract: A lock has improved protection against lock picking. The lock comprises plural tumblers, each generally cylindrical in form with outer and inner circumferential edges, all the tumbles arranged on a common axis. The outer circumferential edge of each tumbler having a single true gate, including a void extending a predetermined distance toward the axis and plural false gates, each having a void of lesser extent. Ridges separates the true gate from adjacent false gates, and separate adjacent false gated from each other. The lock also includes a sheath contacting the inner circumferential edges of the tumblers. The sheath includes ridges located to maintain the tumblers in contact with each other.

Abstract: Systems and methods for controlling a firearm. Components embedded in a portion of the firearm enable the firearm to determine if a user of the firearm is authorized to do so, and either enable or disable a firing mechanism of the firearm accordingly. The firearm may also send communication signals regarding the status of the firearm or events detected by the firearm to a remote device controlled by an authorized user. The system may thereby notify the authorized user of attempted unauthorized use of the firearm, that the firearm has been left behind by the authorized user, or that the firearm is being tampered with. The system may also include multi-tag or a voice-override features that prevent the firearm from being used against the authorized user should the authorized user lose control of the firearm.

Abstract: Systems and methods for controlling a firearm. Components embedded in a portion of the firearm enable the firearm to determine if a user of the firearm is authorized to do so, and either enable or disable a firing mechanism of the firearm accordingly. The firearm may also send communication signals regarding the status of the firearm or events detected by the firearm to a remote device controlled by an authorized user. The system may thereby notify the authorized user of attempted unauthorized use of the firearm, that the firearm has been left behind by the authorized user, or that the firearm is being tampered with. The system may also include multi-tag or a voice-override features that prevent the firearm from being used against the authorized user should the authorized user lose control of the firearm.

Abstract: Systems and methods for controlling a firearm. Components embedded in a portion of the firearm enable the firearm to determine if a user of the firearm is authorized to do so, and either enable or disable a firing mechanism of the firearm accordingly. The firearm may also send communication signals regarding the status of the firearm or events detected by the firearm to a remote device controlled by an authorized user. The system may thereby notify the authorized user of attempted unauthorized use of the firearm, that the firearm has been left behind by the authorized user, or that the firearm is being tampered with. The system may also include multi-tag or a voice-override features that prevent the firearm from being used against the authorized user should the authorized user lose control of the firearm.

Abstract: A handgun safety device comprising a safety element with a firing interrupting element configured for snug projection between a face of a duty cartridge and a fore end of a functional firing element, said safety element being articulated at a first end of a cord having a full length, with a second end configured for attaching to an article worn by a user.

Abstract: A safety lock for a firearm comprises a casing, a releasable locking member at a second end, and a flexible member between the first end and the second end. When the lock is installed on the firearm, the lock extends along the barrel from the chamber to the muzzle end. When in the locked position, the casing is positioned in the chamber and the flexible member extends along the barrel, an ammunition round from being loaded. The safety lock allows a user to dry fire the firearm.

Abstract: A modular safety device configured for retrofitting a firearm, the firearm having a barrel including a muzzle and a chamber at a distal end of the barrel, the modular safety device comprising a blocking rod configured to fit inside the barrel including inside the chamber and to block entry of a cartridge into the chamber, the blocking rod having a lock configured to lockingly affix a locking portion of the lock to the barrel; and a biometric identification system integral to a proximal end of the blocking rod adjacent the muzzle and having a user interface surface accessible for a user to input biometric data of the user, wherein the safety device is configured to be within the firearm such that addition of the safety device to the firearm either does not alter an external shape of the firearm or merely juts slightly out of the muzzle.

Abstract: A firearm obstructer (100) for obstructing a passage (200) between a chamber and a muzzle of a firearm. The firearm obstructer (100) has an arm (101) and a tapered region (105). The arm (101) moves relative to the tapered region (105) to transition the firearm obstructer (100) between locking and unlocking configurations. In the locking configuration, the firearm obstructer (100) engages with the passage (200) to hold the firearm obstructer 100 in place in the passage (200). The firearm obstructer (100) so positioned provides an obstruction in the passage (200). In the unlocking configuration, the firearm obstructer (100) is removable from the passage (200). A method of operating the same.

Abstract: A magazine is provided for a firearm. The magazine comprises a locking mechanism. The locking mechanism has a user interface adapted to enable a user to select between a locked condition and an unlocked condition. The locking mechanism has a rotor movable between a first rotational position when the locking mechanism is in the locked condition and a second rotational position when the locking mechanism is in the unlocked condition. The magazine comprises an elongated shaft connected to the rotor. The magazine comprises a block element connected to the elongated shaft. The block element is adapted to move between a first position when the locking mechanism is in the locked condition in which at least one of firearm operation and magazine extraction are prevented, and a second position when the locking mechanism is in the unlocked condition in which firearm operation and magazine extraction are enabled.

Abstract: A magazine is provided for a firearm. The magazine comprises a locking mechanism. The locking mechanism has a user interface adapted to enable a user to select between a locked condition and an unlocked condition. The locking mechanism has a rotor movable between a first rotational position when the locking mechanism is in the locked condition and a second rotational position when the locking mechanism is in the unlocked condition. The magazine comprises an elongated shaft connected to the rotor. The magazine comprises a block element connected to the elongated shaft. The block element is adapted to move between a first position when the locking mechanism is in the locked condition in which at least one of firearm operation and magazine extraction are prevented, and a second position when the locking mechanism is in the unlocked condition in which firearm operation and magazine extraction are enabled.

Abstract: Methods and systems for pre-configuring a payment vehicle are described. In some embodiments, transaction criteria pertaining to a payment vehicle is proactively received in advance of an anticipated transaction. A transaction authorization request may be received from a point of sale device and may be generated by the point of sale device in response to an attempted use of the payment vehicle. Information about the transaction in the transaction request may be compared with the transaction criteria to determine whether to authorize the transaction.

Abstract: Systems for universally locking a trigger of a firearm are provided that require authentication to transition the firearm to an unlocked state. In general, examples of the systems for universally locking a trigger of a firearm described herein are located in an interchangeable grip portion of the firearm or mounted to an accessory rail of the firearm. Embodiments of the system generally include trigger interference or blocking members to prevent actuation of the trigger until the authentication system has authorized the user to fire the firearm. Once the system is authenticated, embodiments of the system remain in an unlocked state while the user is grasping the firearm. When the user removes their hand from the firearm, embodiments of the trigger locking system automatically returns to a locked state, reducing or eliminating unauthorized use of the firearm.

Abstract: A firearm security system for securing a firearm and alerting an owner of the firearm when an unauthorized user accesses the firearm is disclosed. The firearm security system comprises a rack. The rack comprises a door operated using an authentication mechanism. The rack comprises a magnetic section. The rack comprises a first processor. The firearm is provided with a magnetic strip. The magnetic strip of the firearm is mounted to the magnetic section at the rack. The first processor transmits an alert to an electronic device of the owner when the firearm is removed from the magnetic section without the authentication mechanism, indicating that an unauthorized user removed the firearm from the rack. Thus allowing the rightful owner to be able to locate and retrieve their firearm from the unauthorized user.

Abstract: A portable countermeasure device is provided comprising one or more directional antennae, one or more disruption components and at least one activator. The portable countermeasure device further comprises a body having a dual-grip configuration, with the directional antennae are affixed to a front portion of the body. The one or more disruption components may be internally mounted within the device body. The dual-grip configuration allows an operator to use his body to steady and support the device while maintaining the antenna on target. The second grip is positioned adjacent the first grip, with the first grip angled toward the rear of the device and the second grip angled toward the front of the device. The portable countermeasure device is aimed at a specific drone, the activator is engaged, and disruptive signals are directed toward the drone, disrupting the control, navigation, and other signals to and from the drone.

Abstract: A gun lock of a firearm, the gun lock comprising: a plurality of sensors configured to collect profile information of a user of the firearm; a computing system coupled to the plurality of sensors, the computing system configured to determine whether the user of the firearm is authorized to operate the firearm based on the profile information of the user of the firearm and pre-stored authorized profile database; an actuator coupled to the computing system; a first connecting structure mechanically coupled to the actuator; a second connecting structure mechanically coupled to the first connecting structure; and a third connecting structuring mechanically coupled to the second connecting structure, wherein the computing system is configured to generate a control instruction following determining whether the user of the firearm is authorized to operate the firearm, and the computing system is further configured to transmit the control instruction to the actuator.

Abstract: One aspect includes a smart-gun configured to communicate with user device via a communication network. The smart-gun can be configured from an unlocked configuration where the smart-gun is operable to fire, to a locked configuration where the smart-gun is inoperable to fire, the configuring to the locked configuration in response to a locking signal; and configured from the locked configuration where the smart-gun is inoperable to fire, to the unlocked configuration where the smart-gun is operable to fire, the configuring to the unlocked configuration in response to an unlocking signal.

Abstract: A weapon security apparatus may include a base assembly. The apparatus may further include a first grip plate. The apparatus may also include a second grip plate, the second grip plate moveable between an open position and a closed position relative to the first grip plate, the first grip plate and the second grip plate configured to receive a weapon therebetween and to secure the weapon with a top side of the weapon facing the base assembly.

Abstract: A modular safety device configured for retrofitting a firearm, the firearm having a barrel including a muzzle and a chamber at a distal end of the barrel, the modular safety device comprising a blocking rod configured to fit inside the barrel including inside the chamber and to block entry of a cartridge into the chamber, the blocking rod having a lock configured to lockingly affix a locking portion of the lock to the barrel; and a biometric identification system integral to a proximal end of the blocking rod adjacent the muzzle and having a user interface surface accessible for a user to input biometric data of the user, wherein the safety device is configured to be within the firearm such that addition of the safety device to the firearm either does not alter an external shape of the firearm or merely juts slightly out of the muzzle.

Abstract: A training magazine and safety system for a magazine-fed firearm are provided. The training magazine includes a safety block at a top of the magazine, configured to block the breach of the firearm and thus keep the bolt of the firearm locked to the rear such that the firearm is incapable of firing. The safety block can include a notch in a front portion thereof, which is configured to accommodate a chamber flag while the chamber flag is in the chamber of a firearm. As such, the chamber flag and training magazine can be used together as a safety system. Methods of training are also provided.

Abstract: An anti-loosening endcap for utility crossarm comprising an endcap body inserted into the crossarm, where a channel perpendicular to an inner wall of the crossarm is disposed inside the endcap body, one end of the channel is open, the pointed head pin is slidably disposed in the channel, the pointed head of the pointed head pin faces the inner wall of the crossarm, the endcap is further provided with an axial through passage, the passage and the channel intersect at the tail portion of the pointed head pin, and the corresponding pin is provided for the passage. The pin is driven into the passage, and the pin presses the tail portion of the pointed head pin, so that the pointed head of the pointed head pin pierces the inner wall of the crossarm, thereby providing a locking effect.