"I always thought high caliber rounds could damage cinderblocks.

Would filling it with sand help?"

"I've experimented w/materials and calibers (years ago).

I discovered that under .22 lr fire, cinderblocks go away in short order.

However, brick can withstand .30 cal fire. Cinderblock filled w/concrete can also deal well under .30 cal fire.
brick backed by concrete-filled cinderblock can handle .50 cal "

"Quite right. This "privacy wall" is also a 'fighting' wall meaning I can take shelter in confidence while dealing with certain problem sets.

Also, I plan to begin from this point while "Dealing with Crowds, Non-lethal" at least at first."

"who said that there wasn't any rebar?

"

"There are rebar reinforcements in parts of the wall. I wanted the entire thing to be concrete filled but most of it is."

"What are you thinking about that is going to push over a 30' long solid wall?"

"Im thinking of a 30' wide crowd of solid zombies."

"My intention is to shoot everything before the threat get TO the wall."