and it vaporize due to absorbing thermal energies from the explosion

Similar thing like you're trying to fire an ice bullet

This wouldn't be easy to do, sounds easy but not. You need the metal to stay in a very well disperse form as metal is very dense compare to water and tends to sink to the bottom before the water get frozen. To achieve this, you need, extremely fast freezing which is not easily achieve and the process would be costly as you'd need to source out the correct chemicals to do so (something like liquid nitrogen?) and a very good insulating vessels.
The other method can be done is through solid-liquid colloidal suspension, which you need to source the correct surfactant for it and grinding of the metal to very fine dust, which...is more or less as difficult as the former method.


And ...

If the purpose of making such weapon is to eliminate any traces after using it, then adding any substance into the water to enhances it physical resistance to heat and impact would not be ideal as those substances would become uncommon and more likely lead to getting trace back after all plus the process of sourcing out the apparatus and chemicals to do such a weapon makes you even easier to get trace back, which is not ideal at all. Might as well use a normal gun.

There's isn't such a substance known as 'deadly poison'. Poison kills because u consume it or comes into ur body, not touches, neurotoxins is the cloeset thing. The worst thing you can get is highly corrosive material that will not kill but burn you.

Bullets are already hot as soon as it exist the gun as it absorbs thermal energy from the combustion.

U meant fragments? Something like shotgun? If it's so fragile that it breaks into fragments as soon as it hits, then it wouldn't be very much lethal

Do you even know what is disperse? >_>

Impossible to track? Do you have any idea how sensitive today's instrument is? Metal for instance can be easily track by using AAS even at mmolar range. Some other inorganic qualitative test using chemicals is already sufficient to detect it.

So u might say, so what if they detect metals? It could be something else.

Okay then electron microscope, giving magnification of up to 1000x of your naked eye.

This post has been edited by NicJolin: Mar 24 2010, 08:55 PM

Ice might work, but not pure water. Ice that added with solutes, something like an organic thickener and electrolytes could enhances its resistance to the thermal energy and increases its melting point and boiling point. The chamber which the combustion take place should be lowered in terms of pressure, as this could lower the tendency of ice turning into water. Remember, water is denser than ice.

I think the keypoint is to ensure that the ice stays intact the moment it leaves the chamber.

This post has been edited by NicJolin: Mar 27 2010, 11:51 PM