Maxim Defense MDX 508-SBR .300 Blackout 8.5" Barrel with Arid Finish, MD-CQB Stock, ALG Trigger & Hate Brake – MXM-47924
The Maxim Defense MDX 508-SBR is a high-performance Short Barrel Rifle chambered in .300 Blackout and built for operators and enthusiasts who demand serious terminal ballistics in a compact package. Model MXM-47924 features an 8.5-inch barrel, a modern Arid finish, the MD-CQB stock, an upgraded ALG trigger, MDX two-piece handguard, and the signature Hate Brake flash hider. This factory-configured SBR delivers outstanding maneuverability, reliability, and stopping power in one of the most versatile .300 Blackout platforms available.
Compact .300 Blackout Short Barrel Rifle
The MDX 508-SBR combines an 8.5-inch barrel with premium components to create a highly maneuverable rifle that excels in close-quarters battle, vehicle operations, and dynamic environments. The .300 Blackout cartridge offers significantly better terminal performance than 5.56 NATO, especially at shorter ranges and when using subsonic ammunition. Paired with the MD-CQB stock, this SBR provides superior ergonomics and stability while maintaining the compact profile that makes short-barreled rifles so effective in confined spaces.
Key Features of the Maxim Defense MDX 508-SBR
- 8.5-Inch Barrel – Optimized length for .300 Blackout ballistics in a compact SBR format.
- Arid Finish – Modern desert/tan color scheme with excellent low-visibility characteristics in arid 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.
- MDX Two-Piece Handguard – Lightweight modular handguard with superior heat dissipation and multiple accessory mounting points.
- Hate Brake Flash Hider – Maxim Defense’s signature muzzle device that reduces flash and helps manage recoil.
- 30-Round Capacity – Compatible with standard AR-15 magazines for sustained fire capability.
- Model Number: MXM-47924
- UPC: 680017479244
Technical Specifications
| Specification | Details |
|---|
| Brand | Maxim Defense Industries |
| Model | MDX 508-SBR |
| Model Number | MXM-47924 |
| Caliber | .300 Blackout (300 BLK) |
| Barrel Length | 8.5 Inches |
| Stock | MD-CQB Stock |
| Trigger | ALG Trigger |
| Handguard | MDX Two-Piece Handguard |
| Muzzle Device | Hate Brake Flash Hider |
| Finish | Arid |
| Capacity | 30 Rounds |
| Best Use | CQB, Vehicle Operations, Home Defense, Tactical Use, Suppressed Builds |
Why Choose the Maxim Defense MDX 508-SBR in .300 Blackout?
The Maxim Defense MDX 508-SBR stands out as a complete, factory-optimized Short Barrel Rifle chambered in the versatile .300 Blackout cartridge. Rather than piecing together aftermarket parts, this model comes fully equipped with Maxim Defense’s own MD-CQB stock, an upgraded ALG trigger, and the distinctive Hate Brake. The 8.5-inch barrel paired with the MD-CQB stock creates an excellent balance of compactness and performance. The Arid finish provides a modern tactical appearance that performs well in desert and mixed environments. The .300 Blackout caliber offers superior terminal ballistics compared to 5.56 NATO, making this SBR particularly effective for home defense and tactical applications where stopping power is critical. Maxim Defense has earned a strong reputation for producing reliable, high-quality firearms, and the MDX 508-SBR continues that tradition with a purpose-built platform ready for serious use.
Ideal Applications
This .300 Blackout Short Barrel Rifle is well-suited for a variety of demanding applications. Tactical professionals and law enforcement will appreciate the compact size and enhanced control provided by the MD-CQB stock and ALG trigger. Home defense users benefit from the superior terminal ballistics of the .300 Blackout cartridge combined with the maneuverability of an 8.5-inch barrel. The Arid finish makes this SBR particularly effective for operators working in desert or arid regions. Competitive shooters in dynamic rifle disciplines will also find the combination of the Hate Brake and ALG trigger beneficial for fast, accurate follow-up shots. Its overall length and weight make it easy to handle in confined spaces while still delivering the proven performance of the .300 Blackout cartridge, whether running supersonic or subsonic ammunition.
Build Quality and Performance
Maxim Defense constructs the MDX 508-SBR with quality components designed for real-world reliability and performance. The 8.5-inch barrel provides a strong balance of velocity and handling characteristics for the .300 Blackout cartridge. The MD-CQB stock offers a stable and adjustable shooting platform, while the ALG trigger delivers a noticeably smoother and more consistent pull than standard mil-spec triggers. The MDX two-piece handguard provides excellent heat management and multiple mounting points for optics, lights, and other accessories. The Hate Brake flash hider reduces visible signature and helps control muzzle rise during rapid fire. The Arid finish adds both aesthetic appeal and practical durability. Every MDX 508-SBR is built to Maxim Defense’s high standards, ensuring consistent performance across a wide range of conditions and ammunition types.
Experience premium compact performance with the Maxim Defense MDX 508-SBR. Model MXM-47924 delivers an 8.5-inch barrel .300 Blackout Short Barrel Rifle featuring an Arid finish, MD-CQB stock, ALG trigger, MDX two-piece handguard, and Hate Brake flash hider, making it an excellent choice for close-quarters operations, home defense, and tactical applications.
