This really isn't a "Bullet Maker" but I just needed a cool name for it. It should really be called "How Firearm Ammunition Works" or something like that but, that's boring so whatever. From right to left: .45 ACP cartridge, .45 ACP casing/shell, .45 ACP semi-wadcutter bullet, large pistol primer, gun powder. How bullets come flying out of a rifle or pistols barrel: there is a pin in the rifle or pistol that hits the primer (silver thing) called a firing pin, the primer gets hit by the firing pin, it ignites the gun powder inside of the casing, because of the pressure and explosion from the gun powder inside of the casing, the bullet flies out of the casing, into the barrel of your rifle/handgun, and comes out fly super fast at your target.