They are often modified semi-trucks , SUVs , or other large vehicles not intended for such a purpose .
They are often come equipped with varying levels of protection and attack capability , but even smaller narco tanks are plated with two inches of steel armor .
They are often modified semi-trucks , SUVs , or other large vehicles not intended for such a purpose , and come equipped with varying levels of protection and attack capability , but even smaller narco tanks are plated with two inches of steel armor .