The Maxim Defense MDX 510 C SBR 5.56 NATO 10.3" Barrel 30rd Urban Grey MXM-48121 is a premium short-barreled rifle designed for operators and serious shooters who demand maximum performance in a compact package. This MDX 510 C SBR features a 10.3-inch barrel chambered in 5.56 NATO, the MDX Two-Piece Handguard, and the highly effective Hate Brake flash hider. Finished in a modern Urban Grey color, this SBR delivers exceptional maneuverability, reliability, and tactical functionality.
Why Choose the Maxim Defense MDX 510 C SBR 5.56 NATO?
The Maxim Defense MDX 510 C SBR is engineered for those who need a highly compact 5.56 NATO rifle without sacrificing features or performance. The 10.3-inch barrel provides excellent ballistic performance while keeping the overall length extremely short and maneuverable. The MDX Two-Piece Handguard offers a lightweight yet rigid platform with extensive M-LOK mounting options. The Hate Brake flash hider significantly reduces muzzle flash and helps control recoil. The Urban Grey finish gives this SBR a modern, tactical appearance that stands out from traditional black firearms. This configuration is ideal for close-quarters battle, home defense, and professional tactical use.
Key Features of the Maxim Defense MDX 510 C SBR 5.56
- 10.3-Inch Barrel – Compact barrel length optimized for 5.56 NATO performance and reliability
- 5.56 NATO Chambering – Versatile and widely available caliber with proven terminal performance
- MDX Two-Piece Handguard – Lightweight, modular handguard with extensive M-LOK accessory mounting
- Hate Brake Flash Hider – Highly effective muzzle device that reduces flash and manages recoil
- Urban Grey Finish – Modern earth-tone finish with a tactical, low-visibility appearance
- 30-Round Capacity – Compatible with standard AR-15 magazines
- Compact SBR Configuration – Designed for maximum maneuverability in confined spaces
- Model MXM-48121 – Official Maxim Defense part number
Performance and Build Quality
The Maxim Defense MDX 510 C SBR is built to the highest standards using premium components throughout. The 10.3-inch barrel is paired with a gas system specifically tuned for reliable cycling with 5.56 NATO ammunition. The MDX Two-Piece Handguard provides a strong, lightweight foundation for mounting optics, lights, lasers, and other accessories while maintaining a slim profile. The Hate Brake flash hider is one of the most effective muzzle devices available, dramatically reducing visible muzzle flash and helping control recoil during rapid fire. The Urban Grey finish provides a modern, non-reflective surface that blends well in various operational environments. This SBR reflects Maxim Defense’s commitment to producing compact, high-performance short-barreled rifles that meet the demanding needs of professional users and serious enthusiasts.
Technical Specifications
| Product Name | Maxim Defense MDX 510 C SBR |
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| Model Number | MXM-48121 |
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| UPC | 680017481216 |
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| Caliber | 5.56 NATO / .223 Remington |
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| Barrel Length | 10.3 inches |
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| Capacity | 30 Rounds |
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| Handguard | MDX Two-Piece Handguard |
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| Muzzle Device | Hate Brake Flash Hider |
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| Finish | Urban Grey |
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| Product Type | Short-Barreled Rifle (SBR) |
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| Key Feature | 10.3" 5.56 SBR with MDX Two-Piece Handguard & Hate Brake |
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| Best For | Close-Quarters Battle, Tactical Operations, Home Defense, Compact Rifle Use |
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Compact performance with modern tactical features.
The Maxim Defense MDX 510 C SBR 5.56 NATO delivers premium components and outstanding reliability in a highly maneuverable Urban Grey finish.
Important Notice: This product is a short-barreled rifle (SBR) and is regulated under the National Firearms Act (NFA). It is the buyer’s responsibility to ensure compliance with all applicable federal, state, and local laws, including proper NFA registration, tax stamp requirements, and any additional state restrictions. This product is intended for lawful use only by individuals legally allowed to possess NFA firearms. Always follow proper firearm safety rules. Keep out of reach of children.
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