User blog comment:Willbachbakal/My BioShock Sequel Idea Dump/@comment-1330314-20100508005559

Ooh, you're close. Just replace "cannon" with "gun" and join the two together.

The color-coded lasers have two uses: One, it sets them apart for the user and friendlies ot identify; and Two, enemies will be able to see what kind of laser's being used on them and react, reducing frustration.