 But I can tell you how they train. At least I know one of the things for sure they train with. Marines too. Mantis X. Mantis X is one of those things the best shooters in the world use it. You know that 90% of your practice should be dry fire practice with your weapon. Did you know that? You think you have to go to the range and drop 100 bucks on ammo every Saturday. You don't. Spend 20 minutes in your living room.