You're on the spear fishing trip of your life, you brought you're big gun and you find the muzzle got cracked in transport. Serious spear fisherman always carry spare just for this reason. Having spare parts on hand when you need them is a diver's motto. A spare gun muzzle can assure you always come home with game. Don't let the lack of spares skunk you on your next hunt, always carry spares. Replacement closed muzzle for Magnum Extra Heavy Duty (XHD) Series Spear Guns. Muzzle is made from durable corrosion free plastic and is easy to install. This Muzzle is a great item for a save a dive kit.