Rock River Arms LAR-15M NM A4 Features The Rock River Arms LAR-15M NM A4 is built around a 20 inch air gauged heavy match stainless steel barrel that is cryogenically treated to relieve internal stress and promote consistent harmonics from shot to shot. A 1:8 twist rate stabilizes a wide range of bullet weights giving shooters flexibility in handloads and factory ammunition alike. The .223 Wylde chamber allows the rifle to safely and accurately fire both 5.56mm NATO and .223 Remington ammunition combining chamber versatility with match-grade precision. An RRA two stage match trigger delivers a crisp predictable break that supports the rifle s documented 3/4 MOA accuracy at 100 yards. The forged A4 upper receiver carries a detachable National Match carry handle fitted with a match hooded aperture rear sight adjustable in half-minute increments paired to an A2 front sight base with a match grade .050 post for precise sight alignment. A free float high temperature thermo mold handguard with a National Match barrel sleeve protects the barrel from contact-induced point of impact shift while keeping the forend cool under sustained fire. An A2 flash hider threaded at 1/2x28 controls muzzle flash without adding excessive length. Finished with an A2 buttstock and A2 pistol grip and shipping with a 20-round magazine hard case and manual the Rock River Arms LAR-15M NM A4 delivers a complete competition-ready precision rifle package. Rock River Arms LAR-15M NM A4 Specifications Manufacturer: Rock River Arms Model: LAR-15M NM A4 Caliber: .223 Wylde Capacity: 20+1 Barrel Length: 20 Barrel Description: Air Gauged Heavy Match Stainless Steel Cryogenically Treated Twist Rate: 1:8 Lower Receiver: Forged RRA LAR-15M Upper Receiver: Forged A4 with Detachable NM Carry Handle Rear Sight: Match Hooded Aperture 1/2 x 1/2 MOA Front Sight: A2 Base with Match .050 Post Muzzle Device: A2 Flash Hider Muzzle Thread: 1/2x28 Trigger: RRA Two Stage Match Handguard: Free Float Thermo Mold with NM Barrel Sleeve Buttstock: A2 Buttstock Pistol Grip: A2 Pistol Grip Overall Length: 39.5 Weight: 9.7 lbs Accuracy: 3/4 MOA at 100 Yards Includes: One 20-Round Magazine Case Manual Color: Black Available At: GrabAGun