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The Concertainer protective system provides better protection with far fewer assets than sandbags or other materials and can be used at fuel points, helipads, artillery/mortar positions, and vehicle barriers. The Hesco Bastion Concertainer Revetment System, which is less expensive than other expedient protective measures, has been exceptionally successful in Bosnia.
Used as non-standard roadblock in Bosnia Used as a bunker
References http://www.clamshell.com/home1.html http://www.mabey.co.uk/homepage.htm http://call.army.mil/products/trngqtr/tq1-98/sandbags.htm