is there a 7 in this set? cause it seems to go from 6 to 8

I'm not sure what you mean, all the lessons are working properly from my end. Are you seeing something differently?

There is a Unity_FPS_06_IronSights.mp4 and the a Unity_FPS_08_ShootingProjectiles.mp4 file. No 7. I think that is the question.

Hmm it looks like one of the lessons was missing. Should be up now.