Complete Upper AR 15 223/556 7.5"

Barrel Length: 7.5"

Barrel Profile: Heavy

Gas System: Pistol-Length

Barrel Steel: 4150V Chrome Moly Vanadium 

Barrel Finish: Nitride

Muzzle Thread: 1/2-28

Chamber: 5.56 NATO or Wylde

Twist Rate: 1/7 or 1/8

Barrel Extension: M4

Diameter at Gas Block: .750"

Gas Block Type: Low-Profile

Receiver Material: Forged 7075 T6  

Receiver Type: M4

Handguard Type: 7" M-Lok Free Float

Bolt Carrier Group Included: Yes

Bolt Steel: Carpenter 158

Charging Handle Included: Ambi Charging Handle