Noveske N4 OG Complete Upper Features The Noveske N4 OG Complete Upper is built around a 12.5 inch 416R stainless steel barrel chambered in 6mm ARC with a 1:7 twist rate and 3-land-and-groove rifling tuned for consistent accuracy with modern 6mm ARC projectiles. A hand polished Noveske Match Chamber and extended hand polished feed ramps improve feeding reliability across a range of bullet weights and profiles. The mid-length gas system paired with a pinned low-profile gas block provides smoother cycling and reduced wear on internal components compared to a carbine length system. A Noveske Pig Pen suppressor-compatible muzzle device is threaded 5/8x24 giving shooters the ideal spacing for mounting a suppressor without re-timing a separate device. The upper is built on Noveske s 4th generation billet 7075-T6 aluminum receiver finished in a durable black Cerakote that resists wear and corrosion through heavy use. A Noveske Love Handle ambidextrous charging handle allows the shooter to manipulate the action from either side of the rifle a valuable feature in dynamic shooting positions. The 10.75 inch NSR free-floating M-LOK handguard provides ample real estate for accessories while its continuous Picatinny top rail ensures a stable uninterrupted mounting surface for optics. Combining precision barrel work with premium furniture the Noveske N4 OG Complete Upper is a strong choice for builders seeking 6mm ARC performance for sale at GrabAGun. Noveske N4 OG Complete Upper Specifications Manufacturer: Noveske Model: N4 OG Complete Upper Caliber: 6mm ARC Barrel Length: 12.5 Barrel Material: 416R Stainless Steel Twist Rate: 1:7 Thread Pattern: 5/8x24 Muzzle Device: Noveske Pig Pen Flash Hider Charging Handle: Noveske Love Handle Ambidextrous Handguard: 10.75 M-LOK Sights: Flat Top Finish: Black Cerakote Available At: GrabAGun