Adjustable Hop-Up With Barrel Extension Assembly |可調式 Hop-Up 及槍膛座總成
M733 / M933 11.5 inch Steel Outer Heavy Barrel|M733 / M933 11.5 吋鋼製重管外管
Gas Tube (Rifle Length)|瓦斯鋼管 (萊福長度)
Gas Tube (Carbine Length)|瓦斯鋼管 (卡賓長度)
KAC SR-15 Carbine 16 inch Steel Outer Barrel|KAC SR-15 卡賓 16 吋 鋼製外管
KAC SR-16 CQB Carbine 11.5 inch Steel Outer Barrel|KAC SR-16 CQB 卡賓 11.5 吋 鋼製外管