Dead Space 3 - Comparing Mk2 To Mk5 To Base Components
edit:New version with better audio balance: http://www.youtu.be/D9E0iXiYKrw
(If you want to watch all of this one, just turn off Annotations, to get rid of the annoying annotation at the top.)
MK-II components alter weapon stats based on slot. Frames increase reload speed. Support modules increase clip size. Weapon Tips increase Rate of Fire. (I think... I might have confused it when writing this part.)