The Rock River Arms LAR-15M NM A4 is a competition-grade 223 Wylde complete upper designed for the AR-15 platform. It features a 20 air-gauged, cryogenically treated heavy match stainless steel barrel with a 1:8 twist for superior accuracy. Built on a forged A4 aluminum receiver with a black finish, it includes a 12.50 rifle-length free-float M-LOK handguard with three modular rails and a railed gas block sight base. This black anodized assembly comes fully equipped with a bolt carrier group and charging handle, providing a match-ready solution for high-precision shooting. Note: The 223 Wylde chamber is specifically designed to safely and accurately fire both .223 Remington and 5.56x45mm NATO ammunition with match-grade performance.