Maxim Defense MXM48172 MD9 | 9mm | 5.50 inch Barrel

The Maxim Defense MD9 (MXM48172) is an AR-style 9mm pistol built around a free-floating barrel and a custom handguard for a monolithic-like upper receiver platform. It ships with a Black Maxim CQB brace and a right-hand polymer grip, and is configured optic-ready for fast red-dot installations. For a practical optic under $1,000, a compact 1x red-dot such as the Vortex Sparc AR pairs well with this platform. Typical applications include range training and PCC-style competition where compact handling and low-recoil 9mm performance are desired.

Product Specifications

• The model is MXM48172 MD9 from Maxim Defense Industries.
• The caliber is 9mm Luger.
• The barrel measures 5.50 inches for compact handling.
• The overall length is 20 inches.
• The action is Semi-Auto.
• The weight is approximately 6 lbs.
• The firearm is supplied with a Black Maxim CQB Brace and a right-hand polymer grip.
• The handguard is a free-floating custom handguard providing a monolithic-like upper receiver platform.
• The sighting interface is optic-ready.
• The safety is a manual thumb design.
• The finish is Black Anodized metal with synthetic components.
• The grip material is Black Polymer.
• The handguard offers M-Slot compatibility for accessory mounting.
• The barrel length range falls into 5 to 5.99 inches per manufacturer classification.
• The UPC is 680017481728.

The MD9 is a compact, purpose-built AR-style 9mm pistol that blends a free-floating handguard and short barrel for agile handling in close courses of fire. Its optic-ready top and M-Slot-compatible handguard let you outfit the platform for rapid target acquisition or dedicated competition roles without excess weight. If you want an AR9 that emphasizes modularity and practical 9mm performance in a compact package, the MXM48172 MD9 is built to meet those needs.