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 CMP is built for competition. The NM A4 CMP features an operator CAR stock, RRA NM CMP TRO 12.5 inch rifle length free float rail hand guard, with three 11.625 inch rifle length NM TRO modular rails and an NM sling swivel, and an NM sling swivel, a gas block sight base, and two stage match trigger. FeaturesA2 flash hiderRRA two stage, match trigger20 inch, heavy match, stainless steel, cryogenically treated, 1:8 twist barrel