I mean rapid fire just a bread and butter weapon skill, I'd be less bothered by this skill if it just existed on the bar. Plus rapid is 10 shots instead of 7 (less delay between shots, harder to avoid), and 1500 range versus 900 range. It also seems to use flaming flurrys animation rig, rather than rapid fires, although I can't be sure, and flaming flurry has notoriously bad tracking on moving targets.