C4 Kit is a functional Item available for both GR and BL. It can be activated/deactivated freely.
Using this item in S&D, Ghost Mode, or Shadow Mode allow players to set/defuse the bomb quicker (2 seconds faster). This can be useful when competing at bomb sites, as players would have more time to deal with their opponents before setting/defusing the bomb, or when players would need to race against the match timer or C4 detonation timer.
Available in all CF versions in Item Shop (price varies depending on version).