There are a few different ways to eject a gun magazine, depending on the type of gun you have. For example, if you have a revolver, you would simply open the cylinder and remove the cartridges one by one. If you have a semi-automatic pistol, you would release the magazine release button and then pull the magazine out of the gun. And if you have an automatic weapon, you would press the magazine release button and let the empty magazine fall out of the gun.
Of course, each type of gun is different, so be sure to consult your owner’s manual or a professional before attempting to eject your gun’s magazine. Once you know how to do it properly, it should be a fairly quick and easy process.