Maxim Defense SDX RFLX Features The Maxim Defense SDX RFLX integrates Maxim s M-Kore reflex suppressor directly over the barrel a design approach that minimizes the added overall length typically associated with suppressed rifles. This over-the-barrel configuration maximizes sound reduction while keeping the rifle s balance close to that of an unsuppressed carbine. A tuned gas system paired with an internal suppressor extension work together to bleed excess pressure efficiently contributing to the SDX RFLX s remarkably quiet 129 dB reading at the shooter s ear with subsonic ammunition. This makes it one of the quietest compact .300 Blackout platforms in its class. Built on the proven SDX platform this SBR pairs a Cerakote-finished receiver with a Maxim Defense stock for a compact ergonomic shooting package. Polymer grips keep the rifle lightweight while providing secure control during rapid strings of fire. Its 30-round capacity and semi-automatic action give shooters ample firepower in a shortened suppressor-integrated footprint. This configuration is purpose-built for shooters who prioritize sound reduction and maneuverability in a single self-contained rifle system. Maxim Defense Industries SDX RFLX Specifications Brand: Maxim Defense Industries Model: SDX RFLX Caliber: .300 AAC Blackout Barrel Length: 8.5 Action: Semi-Automatic Capacity: 30 Rounds Color: Black Finish: Cerakote Grips: Polymer Stock: Maxim Defense Sound Level: 129 dB at Shooter s Ear (Subsonic) Available At: GrabAGun