π Jerk
It is a skill that increases size of the C4, not the range. This skill costs karma which is obtainable through various activities in the game.
Levels:
Level 1: 50% Bigger | 1,000 Karma
Level 2: 100% BiggerΒ | 3,000 Karma
Level 3: 150% Bigger | 6,000 Karma
Level 4: 250% Bigger | 9,000 Karma