300 Blackout AR-15 Pistol Upper Assembly (10.5" Nitride Barrel & 9" Lightweight M-Lok Handguard) 1:8 Twist



This laser-accurate AR-15 upper is the one you need to truly take advantage of 300 Blackout. Featuring a 10.5” mil-spec 4150 CMV barrel and 1:8 twist rate, this upper handles supersonic and subsonic .300 BLK loads with no modification. Just swap magazines, thread a suppressor on the muzzle (5/8-24 threads), and the pistol gas system will do the rest.

This barrel features a nitride coating to dramatically increase barrel length while retaining MOA precision. Nitride coatings afford the same benefits as chrome lining, minus the loss of accuracy. An A3 mil-spec upper receiver finishes off this kit with a Full-Auto (M16) bolt carrier group. Ships test-fired with a Lifetime Warranty.

Barrel Features & Specs:

  • Barrel Length: 10.5″
  • Gas System: Pistol Length
  • Barrel Profile: A2
  • Barrel Steel: 4150 CMV
  • Barrel Finish: Nitride
  • Chrome Lining: None
  • Muzzle Thread: 5/8-24
  • Chamber: 300 Blackout
  • Twist Rate: 1:8
  • Barrel Extension: M4
  • Diameter at Gas Block: .750
  • Gas Block Type: Low-Profile
  • Muzzle Device: A2 Flash Hider

Receiver Features & Specs:

  • Receiver Material: Forged 7075 T6 Aluminum
  • Receiver Type: Flattop M4
  • Handguard Type: 9” Lightweight M-Lok Handguard
  • Bolt Carrier Group Included: Yes
  • Bolt Steel: Carpenter 158 Steel
  • Bolt Carrier Profile: Full-Auto (M16)
  • Charging Handle Included: Yes
No FFL required  Made in the USA  Lifetime Warranty

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