Product Description Upgrade your Ruger Mark IV or Mark IV 22/45 with the Tactical Solutions PAC-LITE barrel and receiver assembly, engineered to be lightweight, highly accurate, and simple to install. Hand-chambered for .22 LR and finished in black anodizing, this replacement upper is designed to enhance overall accuracy, performance, and reliability while keeping the pistol nimble. The 4.50-inch threaded muzzle makes it easy to run compatible muzzle devices such as suppressors or compensators, and the 1-inch outside diameter provides a clean, balanced look with or without an attachment. A target crown and chromoly bore help deliver consistent precision for target shooting and training. Product Highlights Lightweight PAC-LITE barrel and receiver upgrade designed to improve handling and performance Hand-chambered .22 LR with a chromoly bore and target crown for enhanced accuracy 4.50-inch threaded muzzle for easy suppressor or compensator use (thread-on style) 1-inch outside diameter profile for a sleek look and balanced feel with or without muzzle devices Easy-to-install replacement upper for Ruger Mark IV / Mark IV 22/45 pistols Specs Brand: Tactical Solutions Model/Series: PAC-LITE Type: Barrel & receiver assembly (replacement upper) Caliber: .22 LR Barrel Length: 4.50 in Muzzle: Threaded Outside Diameter: 1 in Bore: Chromoly Crown: Target crown Finish: Black anodized Compatibility: Ruger Mark IV and Mark IV 22/45 pistols Manufacturer Part Number: PLIV45TEMBNF UPC: 879971008137 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.