Angstadt Arms MDP-9 9mm 6" 28-Round Threaded Barrel AR Pistol

The Angstadt Arms MDP-9 9mm 6" Threaded Barrel AR Pistol represents a purpose-built platform for shooters demanding compact, reliable firepower in a modern pistol format. Built on the AR-pattern lower receiver architecture, this 9mm platform bridges the gap between traditional pistol ergonomics and the modular customization inherent to the AR ecosystem. Whether for home defense, tactical training, or competitive shooting, the MDP-9 delivers the handling characteristics and magazine capacity (28 rounds) that serious operators have come to expect from a contemporary AR pistol.

The 6-inch threaded barrel is a hallmark design choice, offering a critical balance between velocity and portability. This barrel length maintains reliable 9mm performance while keeping overall length to a manageable 25 inches, making the MDP-9 substantially shorter than its rifle-caliber counterparts. The threaded muzzle accommodates suppressors, compensators, or flash hiders—allowing operators to tailor the platform to their specific mission requirements. Weighing in at 5.3 lbs unloaded, the platform remains controllable in close-quarters environments without sacrificing the structural integrity required for sustained-use applications. The 28-round magazine capacity extends engagement time between reloads, a practical advantage in defensive or training scenarios where shot strings matter.

This platform excels for shooters already invested in AR-pattern ergonomics, maintenance protocols, and aftermarket ecosystems. Law enforcement trainers, civilian operators, and competitive shooters benefit from the familiar controls and the ability to swap parts across other AR platforms in their inventory. The AR pistol format sidesteps the National Firearms Act classification that applies to short-barreled rifles, making it accessible across jurisdictions with specific regulations. Proper eye protection and hearing protection remain essential during operation; the threaded barrel adds flexibility for sound signature management through suppressor integration when legally permissible. Verify all local and federal regulations before acquisition and use.