Vorpal Gun: Main Cannon [5][2d6] Gain the SNICKER-SNACK reaction, which is the only way you can attack with this weapon.

Snicker-Snack Reaction, 1/round Trigger: A hostile character within RANGE of the VORPAL GUN and line of sight deals damage to an allied character. Effect: You may make an attack against the hostile character with the VORPAL GUN.

Stabilizer Mod: 2 SP, Mod Choose a LAUNCHER or CANNON: it gains 5 (range) and ORDNANCE.

Ordnance: This weapon can only be fired before the user moves or takes any other actions on their turn, excepting PROTOCOLS. The user can still act and move normally after attacking. Additionally, because of its size, this weapon can’t be used against targets in engagement with the user’s mech, and cannot be used for OVERWATCH.

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So if you apply Stabilizer Mod to the Vorpal Gun, does that mean it can no longer shoot? How do Ordnance and reactions interact?