The Angstadt Arms UDP-9 is a semi-automatic pistol chambered in 9mm Luger with a 6-inch barrel, 17-round capacity, and a polymer frame in black. Weight is 5 lbs (80 oz). The MSRP is $1,599. 
 

Key Specifications 

• Manufacturer: Angstadt Arms 
• Model: UDP-9 
• Caliber: 9MM Luger (9X19 PAR) 
• Barrel Length: 6 inches 
• Capacity: 17 rounds 
• Weight: 5 lbs (80 oz) 
• Action Type: Semi-Automatic 
• Safety Features: Ambidextrous safety 
• Sights: None (Optic Ready) 
• Stock Material: Polymer 
• Stock Finish: Black 
• MSRP: $1599 
   

Detailed Features 

 
The UDP-9 is built around an AR-9 pattern platform, accepting Glock-compatible magazines. The 6-inch barrel provides more velocity and sight radius than shorter pistol-caliber carbine barrels. The optic-ready slide has no iron sights installed from the factory—a red dot is the intended setup. The ambidextrous safety operates from either side. The polymer frame keeps overall weight down relative to a steel-framed PCC.

The Angstadt UDP-9 draws attention for its compact size, Glock magazine compatibility, and optic-ready configuration. Owners appreciate the build quality and how well it cycles with different 9mm loads. The optic-ready setup is frequently called out as a practical feature for buyers who plan to run a red dot from day one.

The trigger is the most commonly cited area for improvement—some owners find the pull less crisp than they'd like and note that the reset feel varies. Aftermarket support is growing but still thinner than for more established AR-9 brands, which matters to shooters who want a specific parts or accessory ecosystem.

At $1,599 MSRP it sits at the premium end of the pistol-caliber category. Buyers who own it generally feel the build quality justifies the cost; buyers comparing it on spec sheets to less expensive options sometimes question the premium. It's recommended most often for shooters who specifically want the Glock magazine interface and the compact form factor.