“Concrete wall, on top of see-through steel bollards.”
That’s a surprising design. I assume the steel bollards are solid rather than just hollow poles?
“I assume the steel bollards are solid rather than just hollow poles?”
They are definitely a heavy gauge of steel, but not solid steel. They may or may not be filled with concrete.
Bollards have been proven in the field over many years. Other types of metal barriers have been breached with cutting tools, torches or brute force - but not the bollards.