300 Blackout AR-15 Pistol Upper Assembly (7.5" Nitride Barrel & 9" Lightweight M-Lok Handguard) 1:7 Twist



Shoot supersonic or subsonic .300 BLK reliably and accurately with this 7.5” AR-15 upper assembly. Chambered in 300 Blackout, this upper boasts a mil-spec barrel made from 4150 CMV with a nitride finish. A pistol-length gas system and M16 BCG keep things running smoothly, while the nitride finish promises barrel extended life and MOA accuracy.

Finishing off this upper is a mil-spec, forged 7075 T6 flattop upper and a lightweight, free-float M-Lok handguard. This upper ships test-fired and is backed by a Lifetime Warranty. Pair with an 80% lower and jig, a buffer system, and a parts kit, and you'll have all the parts and tools you need to complete a new AR build in a single day!

Barrel Features & Specs:

  • Barrel Length: 7.5″
  • Gas System: Pistol Length
  • Barrel Profile: Heavy
  • Barrel Steel: 4150 CMV
  • Barrel Finish: Nitride
  • Chrome Lining: None
  • Muzzle Thread: 5/8-24
  • Chamber: 300 Blackout
  • Twist Rate: 1:7
  • Barrel Extension: M4
  • Diameter at Gas Block: .750
  • Gas Block Type: Low-Profile
  • Muzzle Device: Fluted Flash Can

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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