Complete Upper AR 9 7.5"

Barrel Length: 7.5"
Barrel Profile: Heavy
Barrel Steel: Chrome Moly Vanadium 
Barrel Finish: Nitride 
Chrome Lining: No
Muzzle Thread: 1/2-36
Chamber: 9mm (9x19)
Twist Rate: 1 in 10"
Barrel Extension: 9mm
Receiver Material: Forged 7075 T6
Receiver Type: M4
Handguard Type: 7" M-lock Rail
Bolt Included: Yes 
Bolt Steel: 8620 
Charging Handle Included: Yes