The M530 barrier arm is a multi-purpose entry drop-arm that controls traffic while providing an anti-ram obstacle to protect from potential vehicular threats.

The M530 has two successfully tested designs. The 22-foot barrier design does not require excavation across the roadway, whereas the 12-foot barrier design uses a shallow excavation across the roadway for a monolithic installation. The M530 barrier arm is also available in engineered design lengths to fit specific site requirements.