The stuff the come up with to make money on people’s fear any id10T can a shipping RV on top of a hill behind a dirt burm and if you understand trajectories it’s bulletproof bear spray 2 by with 6 inch nails in them
All the talk about the trailer, but nothing about the tow vehicle. Level 3 is not what I would call bulletproof either. Modern cartridges can get through a level 3. Level 4 would be a good start. The only thing I have that will stop a high velocity round is sand/gravel, and it does a great job as noted above.