Product DescriptionUpgrade a straight blowback AR-9 to a more refined roller-delayed operating system with the Maxim Roller Delayed Blowback (RDB) System Buffer. Designed specifically for use with Maxim Defense CQB length buffer tubes, this buffer helps deliver smoother cycling, reduced felt recoil, and improved controllability for consistent performance. By delaying bolt opening until chamber pressure drops, the roller-delayed design can also aid shooting comfort and suppressor use.Product Highlights Converts straight blowback AR-9 operation to a roller-delayed system for smoother cycling Helps reduce felt recoil and improve control for better on-target performance Delay-locking mechanism waits for chamber pressure to drop before bolt opening CQB length configuration designed to work with Maxim Defense CQB buffer tubes only Durable steel construction for hard-use reliabilitySpecs Brand: Maxim Model: Roller Delayed Blowback System Buffer Series: CQB Caliber: 9mm Luger Compatibility: Maxim Defense CQB buffer tube (CQB length) only Material: Steel Weight: 8.30 oz Dimensions: 8.5 in (L) x 2.1 in (W) x 1.8 in (H) MPN: MXM47838 UPC: 680017478384Disclaimer: 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.