Used Outer M4 Barrel

2 Black non thread 5 ⅛ black 5 ⅛ silver 5 ⅜ black non thread 5 ½ black 6 Black 6 ¾ black 7 ⅞ black 8 black 8 ⅜ black 9 ¼ black 9 ⅞ black 10 black 10 ⅜ black 10 ½ black 10 ⅝ black 10 ¾ black 11 ¼ black 11 ½ gold 12 black 12 ¾ black 14 ½ black 16 ⅞ black