Maxim Defense Black MDX:508 CP 300 BLK 8.5" Pistol - Gen. 7 CQB Brace

Maxim Defense Black MDX:508 CP 300 BLK 8.5" Pistol - Gen. 7 CQB Brace

When precision meets power in a compact form, you get the MDX:508 Pistol—a tactical evolution born from the legendary PDX platform. Designed for operators who demand reliability, enhanced velocity, and superior control, the MDX:508 delivers uncompromising performance in a sleek, maneuverable package.

Featuring an 8.5” barrel, this pistol strikes the perfect balance between compactness and ballistic efficiency, making it ideal for close-quarters engagements and rapid deployment scenarios. The Gen. 7 CQB Brace ensures ergonomic comfort and stability, while the proprietary bolt carrier group and buffer system guarantee smooth cycling and long-term durability under extreme conditions.

What truly sets the MDX:508 apart is the HATEBRAKE muzzle booster—a patent-pending innovation that reduces recoil, minimizes flash, and directs gas and concussion away from the shooter for a cleaner, more controlled experience. Built from aerospace-grade materials and finished in rugged Type III anodizing, this pistol is engineered to perform and built to last.

Extended Barrel Performance
8.5” barrel delivers higher muzzle velocity and improved ballistic performance without sacrificing maneuverability.

Advanced CQB Brace
Gen. 7 CQB Brace adds only 5.375” to the receiver, extending to 10” for optimal control and operator comfort.

Proprietary Bolt Carrier Group
Engineered for extreme durability and smooth cycling, even under high-stress conditions.

HATEBRAKE Muzzle Booster
Reduces recoil and flash, while directing gas and concussion downrange for enhanced shooter comfort and tactical advantage.

Premium Material Composition
Constructed from 6Al-4V titanium, 17-4 stainless steel, and aircraft-grade aluminum for strength, weight savings, and corrosion resistance.

Durable Finish
Type III anodized coating provides long-lasting protection against wear and environmental exposure.

Optimized for .300BLK
Chambered in .300 Blackout for versatile performance in suppressed and unsuppressed configurations.

Specifications

• Caliber: .300BLK
• Barrel Length: 8.5 inches
• Thread Pitch: 5/8x24
• Weight: 6 lbs 5 oz
• Overall Length: 21.5 inches
• Material Composition: 6Al-4V titanium, 17-4 stainless steel, 7075 and 6061 aluminum
• Finish: Type III anodized
• Stock/Brace Option: Gen. 7 CQB Brace
• Brace Extension: 5.375” collapsed, 10” fully extended
• Muzzle Device: Maxim HATEBRAKE (patent-pending)
• Bolt Carrier Group: Proprietary Maxim design
• Buffer & Spring System: Maxim proprietary components for smooth cycling