Product Description The Noveske 18" SPR Stainless Barrel in 6mm ARC is a match-grade barrel assembly precision-engineered for AR-15 platform builds that demand long-range accuracy and consistent performance. Manufactured by Noveske Rifleworks in Grants Pass, Oregon, this barrel is constructed from 416R stainless steel and features a hand polished Noveske Match 6mm ARC chamber for exceptional shot-to-shot consistency. The 1:7 twist rate and 3-land-and-groove rifling deliver outstanding stabilization across a wide range of 6mm ARC bullet weights. A complete upper-ready assembly, it ships with a rifle-length gas tube, a Noveske marked Lo-Pro gas block pinned to the barrel, and a headspaced DLC coated Noveske 6mm ARC bolt, making it ready to drop into your upper receiver build. Each barrel is individually serialized for strict quality control traceability, reflecting Noveske&';s commitment to precision craftsmanship. Product Highlights 18" 416R Stainless Steel barrel with a 1:7 twist rate and 3-land-and-groove rifling optimized for 6mm ARC projectiles at mid-to-long-range distances Includes a Noveske marked Lo-Pro gas block (.750" journal) pinned to the barrel and a rifle-length gas tube for reliable, consistent cycling Hand polished Noveske Match 6mm ARC chamber and extended hand polished feed ramps ensure smooth feeding and match-grade accuracy 60 degree muzzle crown with 5/8"x24 muzzle threads for broad compatibility with suppressors and muzzle devices Ships with a headspaced DLC coated Noveske 6mm ARC bolt; individually serialized barrel for quality control and traceability Specs Brand: Noveske Caliber: 6mm ARC Barrel Length: 18" Material: 416R Stainless Steel Twist Rate: 1:7 Rifling: 3 Land and Groove Gas System: Rifle Length (Lo-Pro) Gas Block Diameter: .750" Muzzle Threads: 5/8"x24 Muzzle Crown: 60 Degree Finish: Bead Blasted Weight: 37.4 oz Feed Ramps: Extended Hand Polished Includes: Rifle-length gas tube, Noveske Lo-Pro gas block (pinned), headspaced DLC coated Noveske 6mm ARC bolt UPC: 840906131206 MPN: 07000433 Disclaimer: We strive to provide accurate and up-to-date product descriptions, specifications, and images; however, errors or omissions may occasionally occur. We are not responsible for any inaccuracies or discrepancies in the content provided. If you notice anything incorrect or unclear, please contact us so we can correct it. When in doubt, we recommend verifying details directly with the product&';s manufacturer.