A weapon training system for an indirect firing weapon. The weapon training system includes a firing box including at least one processor, and a firing mechanism communicatively coupled with the firing box. Activation of the firing mechanism causes a simulated firing of the indirect firing weapon. The weapon training system also includes a round sensor communicatively coupled with the firing box. The round sensor is operable to be attached to or integrated with a round compatible with the weapon. The round is operable to be inserted into a breech of the weapon. The weapon training system further includes a breech sensor communicatively coupled with the firing box. The breech sensor is configured to detect an insertion of the round into the breech of the weapon via detection of the round sensor.