Directly from the front lines to your collection, the FN 15 Military Collector Series M16 is a military replica rifle made to FN's exacting specifications. The semi-automatic rifle is chambered in 5.56x45mm NATO and features a 20-inch, 1:7a ^2 RH, button-broached, and chrome-lined barrel. The UID-labeled lower receiver is equipped with an ambidextrous selector switch, just like its select-fire big brother.FeaturesAmbidextrous selectorKnights Armament M5 RAS Adapter rail with rail adapter coversFlat-top receiver MIL-STD-1913 rail at the 12 o'clock positionUID label