Rail covers for KeyMod handguards in the form of the PTS BCM KeyMod Panel Kit are available at Airsoft Atlanta... "PTS BCM Gunfighter Keymod Rail Panel Kit. 5-pack (five) rail section covers at 5.5 inches in length each.  Fits on all Keymod rail systems for a polymer covering. Can be cut to length for custom fits (easy to cut).  Rounded edges for a very comfortable grip. Comes in Black or Flat Dark Earth (tan) colors.  Official BCM product."