The Non-Reciprocating Charging Handle (NRCH) assembly upgrade kit gives current FN SCAR Owners even more adaptability and modularity for their rifles with new non-reciprocating dual charging handles enabling any shooting position grip style or optic choice. – The assembly contains a new NRCH bolt carrier innovative charging handle sled and two ambidextrous reversible charging handles that lock forward on bolt-close and remain static during fire providing superior forward assist capabilities. – The FN SCAR NRCH assembly upgrade improves the handling characteristics of an inherently more accurate and reliable platform that in its military configuration has served America’s most elite fighting forces for more than a decade. – FN SCAR NRCH Light Kit is only compatible with FN SCAR 16S models.