Angstadt Arms UDP-9 Rifle 9mm 16" Threaded

Angstadt Arms UDP-9: The Modern 9mm Rifle

The UDP-9 represents a thoughtful approach to the 9mm rifle platform. It's built on proven AR-15 architecture but optimized specifically for 9mm performance and handling.

Key Features

Ergonomics and Handling

• Flared magwell for faster, more intuitive magazine changes
• Integrated oversized trigger guard for gloved operation
• B5 Systems Bravo stock and pistol grip for comfortable control
• Ultralight 15" handguard with M-LOK mounting at 3, 6, 9, and 12 o'clock positions
• Weighs just 6 lbs—ideal for extended shooting sessions

Reliability and Function

• Last-round bolt hold open keeps the action locked back when the magazine empties
• 9mm-specific bolt assembly paired with standard AR-15 hammer
• Milspec fire control group compatible with most aftermarket 9mm triggers
• Accepts all Glock-pattern double-stack magazines (factory Glock magazines recommended)

Barrel and Suppressor Ready

• 16" chrome moly barrel with 1/10 twist and black melonite finish
• Threaded 1/2×28 for suppressor mounting
• A2-style flash suppressor included

Construction

• 7075-T6 billet aluminum lower receiver with matte black hard-coat anodized finish
• 7075-T6 billet aluminum upper receiver with appropriately sized ejection port
• No forward assist or dust cover—clean, minimalist design

Why Choose the UDP-9?

This rifle delivers the ergonomics and modularity of the AR-15 platform in a caliber that's economical to shoot and effective for training, sport shooting, and home defense. The 9mm cartridge offers manageable recoil, lower ammunition costs, and proven reliability.