Noveske OG Barrel Features The Noveske OG Barrel is machined from 416R stainless steel and cut with a 1 to 7 inch twist rate suited to the heavier bullet weights that make the 6mm ARC cartridge effective at extended range. A hand polished Noveske proprietary match chamber improves consistency round to round while extended hand polished feed ramps smooth feeding from the magazine into the chamber. The barrel s Disruptive Deep Fluting pattern removes weight from the barrel without sacrificing rigidity helping keep the completed rifle balanced and quick to handle. At 12.5 inches the barrel is sized for a compact AR-15 build that still retains enough barrel length to extract solid velocity from the 6mm ARC round. The barrel ships with a pinned Noveske low profile gas block set to a mid length gas system a configuration chosen to soften the impulse and cycle more reliably across ammunition loads. A 5/8x24 threaded muzzle accepts a wide range of muzzle devices and suppressors in that pattern. Each barrel is individually serialized and includes a headspaced DLC coated 6mm ARC bolt along with a gas tube matched to the gas system so the kit arrives as a complete ready to install barreled assembly. For builders assembling a dedicated 6mm ARC upper the Noveske OG Barrel removes the guesswork of matching gas system length twist rate and bolt headspacing for sale at GrabAGun. Noveske OG Barrel Specifications Manufacturer: Noveske Model: OG Barrel Caliber: 6mm ARC Barrel Length: 12.5 Material: 416R Stainless Steel Color: Silver Finish: Bead Blasted Twist Rate: 1:7 Gas System: Mid-Length Barrel Type: Threaded 5/8x24 Fluting: Disruptive Deep Fluting Included: Pinned Low-Profile Gas Block Headspaced DLC Bolt Compatible Hosts: AR-15 Available At: GrabAGun