Great idea u get a +1 for me and nice to see u putted hard work in ur idea
As long as the train isn't moving it's okay to me. You'll need to find a nice location with obstacles/cover and places to put markers tho.
or else you can keep the train stationary and the doors of train open during rob
What about making the train carry ammo so it's an Ammunition Robbery? You get a certain ammount of ammo when you succeed.
It can't be in LV because MW doesn't match with CnR. How about put the train robbery in SF? I know the perfect place for that. How about the Train Station near Doherty?