What are these army cubes?

Do you think what the Army needs the designer?

Here is a system of armored units UPC-23 for quickly and without additional equipment to build defensive structures of any complexity and configuration. Built from blocks wall protects the fighter from the bullets of small arms, including from large-caliber armor-piercing weapons, as well as fragments. To build such a wall alone can not every soldier, because the weight of the unit with a porthole - 50 kg, and without loopholes - 75 kg.


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