Angstadt Arms AAUDP09PF6 UDP-9 9mm | 6″ Threaded Barrel

The Angstadt Arms UDP-9 is a compact AR-style pistol chambered in 9mm designed around Glock-compatible magazines and a PCC-style operating system. It features a 6″ threaded Black Melonite barrel, a 5.50″ free-float M-LOK handguard and a continuous mil-spec 1913 Picatinny rail for optics and accessories. For a close-quarters shooting setup, a red-dot such as the Vortex Venom (6 MOA) pairs well with this platform and stays well under $1,000.

Common real-world uses include competitive pistol-caliber carbine (PCC) matches and dedicated range/practice sessions where fast follow-up shots and parts commonality with Glock magazines are priorities.

Product Specifications

• The action is Semi-Auto.
• The barrel measures 6″ and is finished in Black Melonite.
• The barrel length range is 6″ to 6.99″.
• The barrel is threaded 1/2×28 to accept muzzle devices and suppressors where legal.
• The handguard is a 5.50″ free float M-LOK ultra-light design.
• The upper and lower receivers are machined from 7075-T6 billet aluminum with multiple finish options.
• Finish options include matte black hard-coat anodized, Flat Dark Earth Cerakote, or Tactical Grey Cerakote.
• The bolt assembly is a 9mm bolt assembly configured for use with a standard AR-15 hammer.
• The fire control group is a Mil-Spec AR-15/M4 unit compatible with most aftermarket 9mm PCC triggers.
• The pistol features a continuous top mil-spec 1913 Picatinny rail for optics and sights.
• The grip is a B5 Systems pistol grip.
• The overall length measures 22″.
• The design includes last-round bolt hold open, a flared magwell and an integrated oversized trigger guard.
• Patent status is listed as patent pending.
• The UPC is 853427007844.

The UDP-9 is engineered for shooters who want an AR-platform pistol that accepts Glock-pattern magazines and offers a compact, modular mounting platform. The 5.50″ free-float M-LOK handguard and full-length rail make it straightforward to outfit with offsets, aiming devices, and accessories for competition or dedicated range use. Its billet 7075-T6 receivers and threaded barrel provide a solid foundation for upgrades without sacrificing the platform’s compact footprint.