Product DescriptionThe Primary Weapons Systems (PWS) MK116 MOD 1-M upper receiver assembly is built for shooters who want the proven reliability of a long-stroke piston system in an AR-15-pattern upper. This complete upper features a 16.1-inch barrel in 7.62x39, a free-float M-LOK handguard for modern accessory mounting, and an anodized black finish for durability. A 3-position adjustable gas regulator helps tune performance for different conditions and ammunition, while the included Radian Raptor ambidextrous charging handle enhances handling and control.Product HighlightsPWS long-stroke piston operating system for cleaner-running, reliable performance3-setting adjustable gas regulator for tuning and control16.1-inch 7.62x39 upper receiver assembly designed to fit AR-15-pattern platformsFree-float M-LOK handguard for a lightweight, adaptable accessory setupIncludes Radian Raptor ambidextrous charging handle for fast, intuitive manipulationSpecsBrand: Primary Weapons SystemsModel/Series: MK116 MOD 1-MProduct Type: Complete Upper Receiver AssemblyPlatform Fit: AR-15Caliber: 7.62x39Barrel Length: 16.1 inOperating System: PWS Long Stroke Piston SystemGas Regulation: 3-setting adjustable gas regulatorHandguard: Free-float M-LOKCharging Handle: Radian Raptor ambidextrousFinish/Color: Anodized, BlackMuzzle Device: Triad30 (per listed configuration)Manufacturer Part Number: MK1-M1U-762X39-16UPC: 811154033512Disclaimer: 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.