FN 15 Military Collector 5.56mm NATO 20in Matte Black Semi Automatic Modern Sporting Rifle - 30+1 Rounds - The FN 15 Military Collector Series M16 is a military-replica rifle made to FN's exacting specifications. This semi-automatic rifle features an M16-profile, 20in, 1: 7in RH, button-broached, and chrome-lined barrel. The UID-labeled lower receiver is equipped with an ambidextrous selector switch.