King Arms 3pcs 120rd 40mm Co2 Grenade Gas Cartridge Shell Version IIIKing Arms 3pcs 120rd 40mm Co2 Grenade Gas Cartridge Shell Version III Precision CNC machined aluminum construction. Anodized Finishing. Heavy duty steel valve. Mosquito molds shotgun canister shot style ""flying wall of BB's"". Suitable for E&C, D Boys, CYMA, Echo1, CAQ, STAR, G&P, Matrix, Classic Army and King Arms 40mm grenade launcher. Fit all standard 40mm grenade launcher. Suitable for 40mm M203 launcher. Contain 12 slots & each slot can store