APF AR-15 Barrel 300 Blackout, 16" 1:8 Twist, Carbine Length Gas System Out of stock. Check back later... Price: $139.95 Notify me when this item is back in stock (log in required) Description Details Reviews Shipping info UPC: APF_300BLK_BarrelManufacturer: APF ArmoryModel: APF_300BLK_BarrelCaliber: 5.56x45mm NATOCategory: OtherPartsBarrelsStock: 0Unit/Measure: ea This item may be shipped directly to your home address, unless you live in a restricted state.