I've found an alternative that is a little less convoluted:
1. Same as above to create trigger
2. Create scripted mine dispensers (APERSMineDispenser_Ammo_Scripted) via a script. For example: Create a game logic where you want to mine with init code: dispenser1 = "APERSMineDispenser_Ammo_Scripted" createVehicle (position this)
3. Activation code of trigger:
dispenser1 setDamage 1
Hope this helps!