The answer to this riddle is a single word. It should be slightly harder than my simultaneously posted Riddle with a twist, but still fairly easy.
From the middle of the sun through all the rain,
Colours stretch from money to money.
Between the end of life and the start of death,
The first part of me resides.
Now you need to pick sides,
But keep away from the twin snakes.
I am the weapon the other side lacks,
And by now you should know what I am.