VI46 L GBB
VI46 S GBB
VIPER TECH M16A3 RAS GBB
M4 CQB AAC TYPE GBB | M4 CQB AAC版 GBB
VIPER TECH MK-18 MOD 0 GBB
VIPER TECH M4A1 RAS GBB
M16A2 / M16A3 / M16A4 20 inch Steel Outer Heavy Barrel|M16A2 / M16A3 / M16A4 20 吋鋼製重管外管
M16A2 Carbine 16 inch Steel Outer Heavy Barrel|M16A2 卡賓 16 吋鋼製重管外管
M16A2 Carbine 14.5 inch Steel Outer Heavy Barrel|M16A2 卡賓 14.5 吋鋼製重管外管
M4A1 14.5 inch Steel Outer Barrel|M4A1 14.5 吋鋼製外管
Mk 18 Mod 0 / M4 CQBR (LMT Type) 10.5 inch Steel Outer Barrel|Mk 18 Mod 0 / M4 CQBR (LMT 型式) 10.5 吋鋼製外管
M4 Pistol 8 inch Steel Outer Barrel|M4 Pistol 8 吋鋼製外管