Product Description The HK 51000982 threaded tactical barrel is a direct drop-in replacement barrel designed for the HK45 Compact Tactical (HK45C / HK45CT) platform. Built from black-finished steel and chambered in .45 ACP, this 4.57-inch barrel features metric 16x1 left-hand threads to support compatible suppressors and muzzle devices. Engineered for hard use, it is a great upgrade for shooters who want added versatility while maintaining factory-fit performance. Product Highlights Direct drop-in replacement barrel for HK45 Compact Tactical (HK45C / HK45CT) pistols 4.57-inch .45 ACP barrel length for compact tactical performance Metric 16x1 left-hand threaded muzzle for suppressor and muzzle device compatibility Black steel construction for durability and long service life Designed to enhance versatility for tactical and range use Specs Brand: HK Manufacturer Part Number: 51000982 UPC: 642230269859 Type: Pistol barrel (threaded) Caliber: .45 ACP Barrel Length: 4.57 in Material: Steel Finish/Color: Black Thread Pitch: M16x1 (left-hand) Compatibility: Fits HK45 Compact Tactical (HK45C / HK45CT); not for full-size HK45 or USP models 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 products manufacturer.