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Manufacturer Part #: AAUDP56RGR
UPC: 850035894040

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Angstadt Arms, UDP-556, Semi-automatic, AR, .223 Remington/5.56NATO, 16" 1:7 Twist Chrome Lined Barrel, Cerakoted Aluminum, Gray, 16" Ultra Light Free Float M-lok Rail, B5 Type 23 Grip, B5 SopMod Stock, 30 Rounds, 1 Magazine


WARNING: This product can expose you to chemicals including lead, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to


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  • Enhanced Flared Magwell for faster reloads
  • Threaded bolt catch screw
  • Upper Tension Screw
  • B5 Systems Type-23 Grip
  • Made in the USA
  • 16" 1:7 Twist / 4150 Chrome Moly / 1/2"x28 Treaded
  • One 30 round magazine

Product Description

The UDP-556 has all the features that you are looking for in the AR-15 platform. Chambered in 5.56 NATO, it features a 16" chrome moly barrel with a 1:7 twist and is threaded to 1/2x24, giving you the ability to choose from a number of aftermarket muzzle devices. In addition, the UDP-556 comes standard with a B5 Systems SopMod Stock as well as a B5 Type-23 grip. This rifle is comfortable to handle whether you're a casual shooter or a serious competitor. All models also feature a free floated barrel with a 16" ultra light M-LOK handguard.