The Stalwart post and rail anti-ram barrier is the most economical passive perimeter barrier on the market. The Stalwart standalone design when installed adjacent to an existing perimeter fence, transforms the perimeter into a secure anti-crash perimeter system. The stand-alone post & rail design of the Stalwart system is the simplest anti-ram design on the market. The Stalwart system was designed to conceal its anti-ram components and provide cable support preventing cable stretch that occurs with non-supported cables. The Stalwart framework is manufactured of high-tensile steel and is pre-galvanized inside and out for superior corrosion protection.