Why cant static shiv and rapid firecannon effects stack?

No, I get the bonus range and the 5 chain damage with both items, but I don't get the damage of the 2 items combined.

{quoted}

It increases range by like 1 Teemo.

Hardly gamebreaking.

It would also allow an adc to burst super hard. Imagine a caitlyn getting a head shot procing a crit shiv and cannon hit from max distance. You could get literally one shot.