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



This compact AR-15 upper is chambered in .300 BLK and promises MOA accuracy with supersonic and subsonic loads. A heavy barrel made from 4150 CMV (mil-spec), and a phosphate coating increase barrel life and offer better accuracy than any chrome-lined barrel on the market. Inside, a full-auto (M16) BCG keeps things cycling smoothly, light or heavy. 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

Shipping Restrictions only ships within the United States. Federal legislation dictates we cannot ship our products internationally. Shipping of various parts and/or accessories are prohibited to states and locales (ie New Jersey, California, New York, etc…) with restrictions against certain parts and/or accessories (i.e. states with high-capacity magazine restrictions, manufacturing of semi-automatic weapons, etc..). It is your responsibility to be aware of your local firearms laws before purchasing from our website. We try our best to keep our shipping page current, but laws change daily.

We are a national retailer of individual components and not all products depicted on this website are legal in every state. Shipping of various products found on this website are prohibited to some states (such as California, Connecticut, District of Columbia, New Jersey, New York, Rhode Island, and Washington). The information, pictures, text or products presented on this website are not a representation by us, and should not be understood by you, that any product or completed firearm is legal to assemble or own in your state of residence. We encourage each and every builder to perform their own research about the state and federal laws that apply to them. It is your responsibility to understand the law and we encourage you to consult with an attorney or your local ATF representative.