A weapon training system comprising: a round that is insertable into a barrel of an indirect firing weapon; a charge containing a first magnet and a second magnet and configured to removably attach to the round; an electronic device; and a magnetic sensor system that is insertable into or integrated with the round, the magnetic sensor system comprising: a plurality of magnetic sensors; and a microcontroller communicatively coupled to the plurality of magnetic sensors, wherein the microcontroller is configured to perform operations comprising: receiving a proximity signal from at least one of the plurality of magnetic sensors indicating a proximity of the first magnet or the second magnet to the plurality of magnetic sensors; determining, based on the proximity signal, that the charge is removably attached to the round; generating an output signal indicating that the charge is removably attached to the round; and wirelessly transmitting the output signal to the electronic device, wherein the electronic device is configured to determine that a simulated firing of the indirect firing weapon is to be performed based on the output signal. a round that is insertable into a barrel of an indirect firing weapon; a charge containing a first magnet and a second magnet and configured to removably attach to the round; an electronic device; and a magnetic sensor system that is insertable into or integrated with the round, the magnetic sensor system comprising: a plurality of magnetic sensors; and a microcontroller communicatively coupled to the plurality of magnetic sensors, wherein the microcontroller is configured to perform operations comprising: receiving a proximity signal from at least one of the plurality of magnetic sensors indicating a proximity of the first magnet or the second magnet to the plurality of magnetic sensors; determining, based on the proximity signal, that the charge is removably attached to the round; generating an output signal indicating that the charge is removably attached to the round; and wirelessly transmitting the output signal to the electronic device, a plurality of magnetic sensors; and a microcontroller communicatively coupled to the plurality of magnetic sensors, wherein the microcontroller is configured to perform operations comprising: receiving a proximity signal from at least one of the plurality of magnetic sensors indicating a proximity of the first magnet or the second magnet to the plurality of magnetic sensors; determining, based on the proximity signal, that the charge is removably attached to the round; generating an output signal indicating that the charge is removably attached to the round; and wirelessly transmitting the output signal to the electronic device, receiving a proximity signal from at least one of the plurality of magnetic sensors indicating a proximity of the first magnet or the second magnet to the plurality of magnetic sensors; determining, based on the proximity signal, that the charge is removably attached to the round; generating an output signal indicating that the charge is removably attached to the round; and wirelessly transmitting the output signal to the electronic device, wherein the electronic device is configured to determine that a simulated firing of the indirect firing weapon is to be performed based on the output signal.