Abstract: A trigger block and tamper notification system for use on a firearm includes the following: a. a main enclosure assembly comprising a housing and at least two protruding elements designed to position, respectively, in front of and in back of a firearm trigger, the protruding element in back of the firearm trigger comprising a circular base; b. a slide assembly comprising a slide housing and two channels to receive the two protruding elements; c. the protruding element in front of the trigger comprising a magnetic reed switch; d. the channel receiving the protruding element with the magnetic reed switch being adjacent to a magnet switch mounted in the slide assembly; e. a keypad on the main enclosure assembly, the keypad connecting to a control module and comprising at least four keys, the four keys enabling input of a secret four-digit number to arm or disarm at least one signaling element; and f.

Abstract: A trigger block and tamper notification system for use on a firearm includes a main enclosure assembly with an engagement element receivable through a trigger guard and a slide assembly having a complemental element releasably engaging the engagement element on an opposing side of the trigger guard. A magnetic reed switch is carried within the engagement element and a switch magnet is mounted in the slide assembly adjacent the complemental element so as to be in a position adjacent the magnetic reed switch when the slide assembly is engaged with the main enclosure assembly. A control module includes a signaling element activated when the switch magnet is moved from the position adjacent the reed switch.