Angstadt Arms UDP-9, 9mm Pistol, with SBA3 Brace, FDE (AAUDP09BF6)


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The UDP-9 is a compact, 9mm AR-15 platform that accepts widely available Glock magazines. Features a last round bolt hold open, 6″ chrome-moly barrel, 7075-T6 aluminum receivers, 1/2×28 threaded muzzle, 5.5″ free-floating M-LOK handguard and SB Tactical SBA3 pistol brace.

*Angstadt Arms recommends using OEM Glock magazines for the UDP-9


  • Last round bolt hold open on an empty magazine
  • Flared magwell for faster reloads
  • Integrated, oversized trigger guard
  • 7075-T6 billet aluminum lower with a matte black hard-coat anodized finish
  • 7075-T6 billet aluminum slick side upper receiver with appropriately sized ejection port and no forward assist or dust cover
  • Threaded bolt catch screw
  • 9mm bolt assembly for use with a standard AR-15 hammer
  • 6” 9mm barrel in chrome moly with a 1/10 twist, black melonite finish and A2 style flash suppressor
  • Barrel is threaded 1/2×36 and can accept a suppressor
  • SB Tactical SBA3 pistol stabilizing brace with 5-position adjustable length of pull settings and an integral, ambidextrous QD sling socket
  • Magpul K2 pistol grip
  • Angstadt Arms 5.5” free float M-LOK hand guard with a modern, ergonomic, 7 side design that allows for 45 degree offset mounting options
  • Continuous top mil-spec 1913 picatinny rail
  • Weight: Sub 5lbs
  • Length: 22″
Color/Finish FDE
Capacity 15+1
Action Semi-Auto
Barrel 6"
Caliber/Gauge 9mm
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