Maxim Defense SDX 508-SBR .300 Blackout 8.5" Barrel Urban Grey with DSX-D 7.62 Suppressor, MD-CQB Stock & ALG Trigger – MXM-49824
The Maxim Defense SDX 508-SBR is a factory-built, suppressed Short Barrel Rifle chambered in .300 Blackout. Model MXM-49824 features an 8.5-inch barrel paired with the integrated DSX-D 7.62 suppressor, finished in a modern Urban Grey color, and equipped with the MD-CQB stock, ALG trigger, and SDX two-piece handguard. This complete suppressed package delivers exceptional maneuverability, powerful terminal ballistics, and reliable performance in one of the most capable .300 Blackout suppressed SBRs available.
Factory-Suppressed .300 Blackout Short Barrel Rifle
The SDX 508-SBR represents Maxim Defense’s commitment to producing complete, optimized suppressed weapon systems. By integrating the DSX-D 7.62 suppressor directly onto the 8.5-inch barrel at the factory, Maxim eliminates the need for aftermarket mounting solutions and ensures proper alignment and function from day one. The .300 Blackout cartridge is perfectly suited for this configuration, offering excellent terminal performance at both supersonic and subsonic velocities. The Urban Grey finish provides a distinctive modern tactical appearance that stands out from traditional black while maintaining a low-visibility profile in urban and mixed environments.
Key Features of the Maxim Defense SDX 508-SBR
- 8.5-Inch Barrel – Optimized length for .300 Blackout ballistics in a compact suppressed SBR format.
- DSX-D 7.62 Suppressor – Factory-integrated suppressor specifically designed and tuned for the SDX platform.
- Urban Grey Finish – Modern tactical color with excellent low-visibility characteristics in urban and mixed environments.
- MD-CQB Stock – Maxim Defense CQB stock for enhanced stability, adjustability, and control.
- ALG Trigger – Upgraded ALG trigger for a crisp, consistent, and reliable trigger pull.
- SDX Two-Piece Handguard – Lightweight modular handguard with excellent heat dissipation and multiple accessory mounting points.
- 30-Round Capacity – Compatible with standard AR-15 magazines.
- Model Number: MXM-49824
- UPC: 680017498245
Technical Specifications
| Specification | Details |
|---|
| Brand | Maxim Defense Industries |
| Model | SDX 508-SBR |
| Model Number | MXM-49824 |
| Caliber | .300 Blackout (300 BLK) |
| Barrel Length | 8.5 Inches |
| Suppressor | DSX-D 7.62 Suppressor (Integrated) |
| Stock | MD-CQB Stock |
| Trigger | ALG Trigger |
| Handguard | SDX Two-Piece Handguard |
| Finish | Urban Grey |
| Capacity | 30 Rounds |
| Best Use | CQB, Suppressed Operations, Vehicle Use, Home Defense, Tactical |
Why Choose the Maxim Defense SDX 508-SBR in Urban Grey?
The Maxim Defense SDX 508-SBR stands out as a complete, factory-optimized suppressed Short Barrel Rifle. The integration of the DSX-D 7.62 suppressor with the 8.5-inch barrel ensures proper alignment, reliable function, and optimized sound suppression right out of the box. The Urban Grey finish provides a modern tactical aesthetic that differentiates this model from standard black rifles while remaining effective in urban and mixed environments. Combined with the MD-CQB stock, upgraded ALG trigger, and modular SDX two-piece handguard, this rifle delivers a level of refinement and performance rarely found in factory-suppressed .300 Blackout platforms. For users who want a ready-to-deploy suppressed SBR with distinctive styling, the MXM-49824 is an outstanding choice.
Ideal Applications
The SDX 508-SBR excels in close-quarters battle, vehicle-based operations, and any scenario where a compact size combined with powerful terminal ballistics is required. The .300 Blackout cartridge paired with a short barrel and dedicated suppressor provides excellent stopping power and penetration at both supersonic and subsonic velocities. The Urban Grey color scheme makes this rifle particularly appealing to shooters who want a modern, tactical look. Tactical professionals, special operations personnel, and serious enthusiasts who require a high-performance suppressed weapon system with unique styling will find this rifle especially valuable. Its overall length and weight make it easy to handle in confined spaces while still delivering the proven performance of the .300 Blackout cartridge.
Build Quality and Performance
Maxim Defense is recognized for producing purpose-built, high-quality firearms and components. The SDX 508-SBR is engineered as a complete system, with every component selected to work in harmony. The SDX two-piece handguard offers excellent heat management and multiple mounting points for lights, lasers, and other accessories. The ALG trigger upgrade provides a noticeably smoother and more consistent trigger pull compared to standard mil-spec triggers. The integrated DSX-D 7.62 suppressor is specifically tuned for the 8.5-inch barrel, delivering effective sound reduction and flash suppression. The Urban Grey finish adds a premium, modern appearance while maintaining durability in harsh conditions. This factory-assembled configuration ensures proper timing, reliable cycling, and consistent performance right out of the box.
Experience premium suppressed performance with the Maxim Defense SDX 508-SBR. Model MXM-49824 delivers a factory-built .300 Blackout Short Barrel Rifle featuring an 8.5-inch barrel, integrated DSX-D 7.62 suppressor, Urban Grey finish, MD-CQB stock, ALG trigger, and SDX two-piece handguard, making it an outstanding choice for suppressed operations, close-quarters work, and tactical applications.
