M16 / AR15 / AR9 Stainless Steel Barrel—9mm 8.375" 1:10

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Outerwild AR9 barrels are produced using our fully automated robotic-driven production line. They are drilled, reamed, rifled, contoured and assembled at our Lake Zurich, Illinois state-of-the-art facility. Outerwild stainless steel barrels are manufactured from 416R bar stock and are incredibly durable, corrosion-resistant and reliable for your 9mm AR pistol build. This barrel is designed to fit a 7" handguard (our Premium, Raven and Onyx handguards are the perfect compliment) with minimal gap between the handguard and a suppressor.

  • Length: 8.375" 
  • Weight: 13.7 ounces
  • Caliber: 9mm
  • Twist Rate: 1:10 RH 
  • Muzzle Thread: 1/2-28 
  • Material: 416R Stainless Steel
  • Finish: Raw
  • Profile: Straight
  • 100% American Made