CMMG Barrel, 556NATO, 16.1" Barrel, 1:7 Twist, Mid-length, 4140 CrMo Salt Bath Nitride Finish, 1/2x28 TPI Thread 55D780A Out of stock. Check back later... $189.95 MSRP Price: $166.23 Notify me when this item is back in stock (log in required) Description Details Reviews Shipping info 1/2x28 TPI Thread UPC: 815835016191Manufacturer: CMMGModel: 55D780ACaliber: 5.56x45mm NATOCategory: PartsOtherBarrelsStock: 0Unit/Measure: ea This item may be shipped directly to your home address, unless you live in a restricted state.