I think you know I meant get in a trash bag then jump in a pool. The gun only works if you know where to shoot. You can shoot yourself in the head and be perfectly fine. If you really want a 100% effective way then get a 12" Chef's Knife and plunge it into your chest, stomach, neck or head. The head will be the quickest as it will cease brain function quite quickly, then the neck as you will drown in your own blood, then the chest as you will bleed to death very close from the heart, and the stomach will last the longest. If you decide to go stomach and you bleed black blood then you've hit the liver and there's no saving you, well done.