Stolen green FOB tech for the Red and Blue players

Gentleman, I have infiltrated the green base and stolen the intelligence. Enclosed is a guide on building double height concrete walls.

Step one: place a short hasco block and build it

Step two: place a second hasco block on top of the first (you do not need to build this one it just has to be placed on the first block)

Step three: select a concrete wall and the silhouette will now appear with a pile of sandbags extending the height of the wall to the top of the short hasco block. The sandbags are counted as part of the concrete wall and will share the durability of the entire concrete wall block.

You can remove the short hasco blocks once your concrete wall is placed and all further walls placed next to the concrete wall will line up to the extended height.