Product DescriptionThe Maxim Roller Delayed Blowback (RDB) System Buffer is designed to upgrade a straight blowback AR-9 into a more efficient, reliable roller-delayed operating system. Built for carbine-length setups, this drop-in system replaces the buffer and spring to help address common AR-9 buffer weight issues, while delivering smoother cycling, reduced felt recoil, and improved accuracy. The roller-delayed locking mechanism helps delay bolt opening until chamber pressure drops, which also makes the platform easier to suppress and more consistent under a wide range of use.Product Highlights Converts straight blowback AR-9 operation to a roller-delayed system for smoother cycling Carbine-length buffer system designed to replace the existing buffer and spring Compatible with most Mil-Spec AR-15 and AR-9 buffer tubes for straightforward installation Helps reduce felt recoil and increase accuracy with delayed bolt opening Suppressor-friendly design that supports more controllable, consistent performanceSpecs Brand: Maxim Manufacturer Part Number: MXM47839 UPC: 680017478391 Model: Roller Delayed Blowback System Buffer Platform Compatibility: Most Mil-Spec AR-15/AR-9 buffer tubes Caliber/Gauge: 9mm Luger (9x19 Parabellum) Material: Steel Product Length: 8.5 in Product Width: 2.1 in Product Height: 1.8 in Weight: 8.3 ozDisclaimer: 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.