Rail covers perform several functions. Added gripping surface, protects rails in un-mounted areas, protects operator from being cut with uncovered rails, prevents gear from hanging-up or being cut and as a locator for positioning attachments such as night vision, etc. Low profile covers are also known as ladder covers, full profile covers (6,5' /16,5cm) are a solid panel. Notes: These covers can be fitted simply by cutting with a pair of common scissors