MK-16 9.3` GBB
MK-16 13.5` GBB
VIP-VI-46 10.5” GBB
VIPER TECH M16/M16A2 20 Inch GBB
VIPER TECH MK-12 MOD 1 GBB (W/Crane Stock)
VIPER TECH MK-12 MOD 1 GBB
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
M4 Pistol 7inch Steel Outer Heavy Barrel|M4 Pistol 7 吋鋼製重管外管