Angstadt Arms UDP-9i Integrally Suppressed Pistol

Available on backorder


The UDP-9i pistol is the lightest and quietest integrally suppressed 9mm AR style pistol on the market.

Firearm Specs:

  • Available as a pistol with SBA3 brace, a short barrel rifle with Magpul stock or a completed upper assembly
  • 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
  • Uses AR-15/M-16 fire control group
  • 9mm bolt assembly for use with a standard AR-15 hammer
  • Accepts all Glock® aftermarket magazines. We recommend using factory Glock® magazines
  • Patent pending

Suppressor Specs:

  • Full auto rated
  • Grade 9 Titanium sleeve
  • 17-4 Heat treated baffle stack
  • Black Cerakote finish
  • User configurable adjustable port system, capably of 0-125 FPS in velocity reduction. Capable of dropping 115gr bulk pack (1,200 fps) down to 1075 fps
  • Vented blast chamber to eliminate first round pop on even 115gr supersonic rounds
  • Overall barrel length = 11.9″ with a 6″ barrel & 5.9″ core

UDP-9iP: Pistol with SBA3 brace:

  • Pinned and welded core to barrel, requires 1 tax stamp (suppressor)
  • Weight under 6 lbs
  • 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
  • ODIN Works 9.5” free float MLOK handguard with continuous top picatinny rail and mounting positions at 3, 6, and 9 o’clock


Additional Information
ManufacturerAngstadt Arms
ModelUDP-9i Pistol
TypeRifle: Semi-Auto
Receiver7075-T6 Billet Aluminum
TriggerMil-Spec Trigger
Barrel Length16″ Chrome Moly with 1/10 Twist
Overall Length32″
Weight5.0 lbs
AccessoriesOne 10 Round Glock Magazine
Product UPCAAUDP09R16

Additional Information Content

Modern Warriors

We started Modern Warriors for the sole purpose of providing a less expensive way to enjoy our love of buying and shooting some really cool stuff. What started as a hobby has turned into a business where we have developed the experience and ability to help you enjoy our same hobby and save you money in the process.

We specialize in tactical weapons, including suppressors, short barrel rifles and full auto weapons. We have routine experience in shooting the weapons we carry, so if you want our opinion on how a weapon operates, we will gladly provide it. We also have expertise working with licensed professionals in setting up gun trusts, which is an ideal way of purchasing, owning and operating any weapon restricted by the National Firearm Act. Don’t let the word “trust” scare you. It is very easy to set one up if you have the right help.

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