Lancer has designed a lightweight carbon fiber handguard to replace the lower picatinny rail on the FN SCAR 16S and 17S, improving ergonomics and providing eleven M-LOK compatible slots for mounting mission-critical accessories such as lights, laser modules, vertical grips, or bipods. The proprietary carbon fiber layup and resin combination provides a structure that not only resists the heat associated with high volume firing but which is also rigid enough to stand up to heavy use.