Have other size Ammo cans?. 30cal, 50cal, Fat 50cal…MTM AC50 or 30 cal?. Another size?. Do you own an Plastic MTM 50 cal ammo can?. Would you like to make it into a quality 37mm flare case?. As you know, The steel ammo can foam is different fit than what the plastic MTM requires - this is what you need.