The LAR15 series of rifles from Rock River Arms are built with extremely tight tolerances and the highest quality components. Every LAR15 has the same receiver, but the differences are very apparent from there. The NM A4 is Rock River's take on the M16A4 platform. The NM A4 features a fixed A2 stock, removable carry handle, mil spec A2 hand guard, and the same feel as the A4. The similarities between this rifle and the A4 change from there. This rifle is equipped with a stainless steel, heavy, match barrel, two stage chrome match trigger, match rear sight, and more! FeaturesA2 flash hiderRRA two stage, match trigger20-inch Air Gauged, heavy match, stainless steel, cryogenically treated, 1:8 twist barrel