FN Upper, 223 Rem/556NATO, 20" Step Cut Barrel, Fits AR15 20-100366 Out of stock. Check back later... $662.00 MSRP Price: $560.00 Notify me when this item is back in stock (log in required) Description Details Reviews Shipping info FN America Upper, 223 Rem/556NATO, 20" Step Cut Barrel, Fits AR15 20-100366 UPC: 845737010188Manufacturer: FN-HerstalModel: 20-100366Caliber: 223 RemCategory: PartsOtherUpper receiverStock: 0Unit/Measure: ea This item may be shipped directly to your home address, unless you live in a restricted state.