ERGO's 18 Slot AR-15 Textured Slim Line Rail Covers (3-pack) protect unmounted rail areas from damage and shield the operator from sharp rail edges. Its rubbery grip surface improves weapon control and is 6.8 inches long. Can easily be trimmed for custom fitting. Low profile and fits all 1913 Picatinny rail systems. Features: Protects from damage and protects shooters from rail edges Molded in santoprene to provide a low profile Easily trimmed for custom fitting