DoubleStar Stronghold G10 Rail Panels 2-Pack Black/Red. The problem people face is what to do with the real-estate thats left uncovered slick and swayed by extreme temperatures. DoubleStar has the solution with their Stronghold MLOK G10 Rail Panels. These panels are CNC machined from the highest quality G10 to provide a textured surface on any MLOK handguard. If you are looking to enhance your grip the Stronghold MLOK panels are the answer Specifications for DoubleStar Stronghold G10 Rail Panels 2-Pack: Manufacturer: DoubleStar Color: Black / Red Fabric/Material: G10 Length: 3.25 in Width: 0.25 in Height: 6 in Mount Type: M-LOK Package Contents: DoubleStar Stronghold G10 Rail Panels 2-Pack DoubleStar DS428-RED: Stronghold G10 Rail Panels 2-Pack Black/Red