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The Angstadt Arms flagship UDP-9 9mm semi-automatic is a superbly modular, compact and lightweight AR-15 type that’s compatible with Glock 9mm magazines. This means one less wheel to invent, potentially greater reliability and greater consumer appeal for those who already own Glocks. This simplifies logistics too since a Glock owner can shift ammo / magazines between the two.

The standard UDP-9 comes in all black. But you can also get the upper and lower receivers and handguard in Magpul FDE or in Tactical Gray. Everything else such as the pistol grip, barrel, flash hider, stock, trigger, etc., remain matte black.

The gun’s compact dimensions mean it’s easy to operate in tight environs making it idea for security, home defense, law enforcement, etc. The UDP-9’s modularity means it’s compatible with virtually all aftermarket AR-15 Mil-Spec components

UDP-9’s standard AR-15 fire control group makes it easy and intuitive to understand and operate. Operation is via a 9mm bolt carrier group that drives the UPP-9’s blowback operated closed bolt system. Finish the magazine, and you’ll appreciate the UDP-9’s last round bolt hold open. Also, the bolt catch screw is threaded.

Adding benefit to this nice design, Angstadt uses matte black hard-coat anodized finished 7075-T6 aerospace billet aluminum for both the upper receiver and lower receiver. The result is lightweight rigidity plus strength.

The upper receiver is topped by a MIL-STD-1913 Picatinny rail. The lower receiver features a flared magwell for more precise and faster magazine swaps. Between the magwell and trigger, you have an oversized trigger guard for gloved operations. Angstadt ships these guns brand new with either a Magpul K2 or B5 Systems pistol grip depending on what they have available.

A central feature is the 6” chrome moly barrel that’s grooved with a 1:10” twist ratio. The barrel has a black Melonite finish. In front is a 1/2x28” TPI thread. The UDP-9 can accept sound suppressors but comes standard with an A2 birdcage style flash suppressor.

In back, you get a lightweight SB Tactical SBA3 pistol stabilizing brace. This minimal and lightweight stabilizing brace has a lever to easily adjust it to five different length-of-pull settings of 6.75", 7.6", 8.25", 8.75" or even 9.5" long. This designed and Made in USA component cleverly integrates an ambidextrous QD sling socket and has an adjustable nylon strap. The carbine receiver extension is lightweight but strong 7075 T6 aluminum. The entire brace weighs 6.75 ounces and is 1.8” wide.

The barrel is housed inside 5.5” length Angstadt Arms free floating M-LOK hand guard. It has a pair of M-LOK slots on the 3, 6 and 9 o’clock flanks and 45-degree offsets lightening ported with tilted racetrack ovals in between. On top is a nice length of Picatinny rail that forms a continuous top with the one atop the upper receiver.

The compact gun’s total length is 22” and the weight is under five pounds. Nicely done, Angstadt Arms. Don’t let the German name fool you, Angstadt is based in Charlotte, North Carolina, and its UDP-9 guns are made there, and thus Made in USA.

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