Inner Barrel (Copper) 9 Inch|內管 (銅)9吋
Inner Barrel (Copper) 11.5 Inch|內管 (銅)11.5吋
Gas Tube (CQB Length) | 瓦斯鋼管 (CQB 長度)
XM177 Flash Hider Rings | XM177 防火帽墊片
M16A2 Steel Flash Hider Assembly (CCW 14 mm)|M16A2 鋼製防火帽總成 (逆 14 mm 牙)
KAC Style Low Profile Gas Block (Bottom Cut Version)|類 KAC 矮型瓦斯鋼管座 (削底版)