Noveske N4 SPR Complete Upper Features The Noveske N4 SPR is built around an 18 inch 416R stainless steel barrel with a 1:7 twist a combination chosen specifically to stabilize the longer heavier bullets that make 6mm ARC effective at extended ranges. A hand polished Noveske Match Chamber and extended hand polished feed ramps work together to improve feeding reliability while supporting the accuracy the chambering is known for. The rifle length gas system paired with a pinned low profile gas block delivers a smoother cycling impulse than a shorter gas system reducing felt recoil and improving consistency shot to shot. A 5/8x24 threaded muzzle fitted with the Noveske Pig Pen suppressor compatible device rounds out a barrel built for serious precision use. The 4th generation billet 7075-T6 aluminum upper receiver provides a strong precisely machined foundation for the barrel and bolt carrier group finished in black Cerakote for durability. A 15 inch NSR free floating M-LOK handguard with a continuous Picatinny top rail gives shooters plenty of real estate for optics lights and other accessories while keeping the barrel isolated from external pressure. The included Noveske Love Handle ambidextrous charging handle allows either hand to charge the rifle without breaking the firing grip. For AR-15 owners who want to add a long range capable 6mm ARC upper with premium Noveske fit and finish the Noveske N4 SPR is available for sale at GrabAGun. Noveske N4 SPR Complete Upper Specifications Manufacturer: Noveske Model: N4 SPR Complete Upper Caliber: 6mm ARC Barrel Length: 18 Color: Black Finish: Cerakote Thread Pattern: 5/8x24 Muzzle Device: Pig Pen Flash Hider Handguard: 15 M-LOK Sights: Flat Top Includes: Love Handle Charging Handle Compatible Hosts: AR-15 Available At: GrabAGun