Product DescriptionThe Q LLC Sugar Weasel 5.56 NATO upper receiver assembly is designed as a replacement upper for your standard Sugar Weasel platform. Built around a 13-inch 5.56 NATO barrel with a 1/2-28 threaded muzzle and tapered 1:7 twist, this upper is engineered for reliable performance and compatibility. It features Q&';s adjustable gas block paired with a pistol length gas system for tuned operation, and it includes a bolt carrier group for a more complete, ready-to-install setup.Product Highlights Designed as a replacement upper for standard Q Sugar Weasel rifle platforms 13-inch 5.56 NATO barrel with 1/2-28 threaded muzzle for muzzle device compatibility Tapered 1:7 twist barrel optimized for common 5.56 NATO projectile weights Adjustable gas block with pistol length gas system for refined function and tuning Includes bolt carrier group for added convenience and a more complete upper assembly Specs Brand: Q LLC Model: Sugar Weasel Upper Caliber: 5.56 NATO Barrel Length: 13 in. Barrel Thread: 1/2-28 Twist Rate: 1:7 Gas System: Pistol length Gas Block: Adjustable Included Components: Bolt carrier group included UPC: 850035705087 Manufacturer Part Number: ACCSW55613INUPPER 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.