Product Description The Sig Sauer Extended Long Stroke Gas Piston (MPN: 4204140-R) is a genuine OEM replacement component engineered specifically for the MCX Spear rifle platform. Designed and manufactured to Sig Sauer&';s exacting quality standards, this extended piston provides reliable long-stroke gas operation, ensuring consistent cycling performance and dependable function under a wide range of conditions. Whether you are restoring your MCX Spear to factory specification or replacing a worn component, this factory-direct part delivers the fit, finish, and durability that Sig Sauer firearms are known for. Product Highlights Genuine Sig Sauer OEM Part: Manufactured to factory specifications for the MCX Spear rifle platform, ensuring a precise drop-in fit and reliable performance. Extended Long Stroke Design: The extended long-stroke gas piston configuration provides enhanced cycling reliability and consistent gas regulation for improved operational consistency. Platform-Specific Engineering: Engineered exclusively for the Sig Sauer MCX Spear, this piston is not a universal part, guaranteeing compatibility with your specific firearm. Direct Replacement Component: Ideal for restoring worn or damaged gas system components to factory condition and maintaining the integrity of your MCX Spear. Quality Assurance: Backed by Sig Sauer&';s reputation for precision manufacturing, this part meets the same rigorous tolerances as components found in new production firearms. Specs Brand: Sig Sauer Manufacturer Part Number (MPN): 4204140-R UPC: 798681687831 Compatible Platform: Sig Sauer MCX Spear Type: Extended Piston, Long Stroke Width: 4.00 in Length: 4.50 in Height: 0.90 in Weight: 0.06 lbs 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. ]]>