I know a few like flame throwers and bombs(that are simple) but does anyone know how to make cool,simple,or complex weapons out of general or scrap parts?If so say whats needed to build it and how to.

Here.

A homemade .22 silenced pistol.

I don't think this thread is legal

This.
Also: http://forums.datarealms.com/viewtopic.php?f=7&t=16783&p=310687

That thread had a few and I already knew how to make napalm .

Btw does anyone know whats the material that floats around in lava lamps?

That's a mix of parrafin wax and carbon tetrachloride.

And if you don't mind a small suggestion, rename the thread to Chemistry Fun or something like that. Might attract more readers and we can share chemistry tricks with each other

And if you do decide to rename the thread, here is my first contribution.

Mercury Fulminate.