In Montreal, of all places, and at night; do call the police. Explain exactly what you are planning to do, when, where, for how long, and be crystal clear that an actor dressed like a soldier will be used. Also be very clear that a Non-Firearm replica gun will be used.
If they answer Yes, follow their instructions and fill paperwork. If they say NO, forget it entirely.
Even better, contact the PQAC guys as I know some of them do film work.
Finding someone with an Israeli setup may be the tough part.