The Rock River Arms LAR-15M All Terrain Hunter is a high-precision 223 Wylde complete upper assembly optimized for both hunting and target applications. It features an 18 heavy match stainless steel barrel that is cryogenically treated for enhanced stress relief and shot-to-shot consistency. Built on a forged A4 aluminum receiver with a black finish, this AR-15 unit includes a 13 extended lightweight free-float M-LOK handguard and a pre-installed RRA Operator Brake with a 1/2-28 thread pattern. This complete assembly comes fully equipped with a bolt carrier group and charging handle, ready to interface with any standard AR-15 lower receiver. Note: The 223 Wylde chambering is a hybrid design that provides the accuracy benefits of a .223 Remington match chamber while safely handling the higher pressures of 5.56x45mm NATO ammunition.