C4 Wires that cause it to explode Extremely expensive Default: 1 Explode Level One: 2 Explode Level Two 3 Explode Level Three: 4 Explode Level Four 5 Explode C4 Range Moderately Expensive Level 1: 10% Larger Level 2: 20% Larger Level 3: 30% Larger level 4: 40% Larger Level 5: 50% Larger C4 Timer All of these upgrades are fairly expensive Level 1: Minimum 40 Sec Level 2: Minimum 35 Sec Level 3: Minimum 30 Sec C4 Beep All of these upgrades are very expensive Level 1: 20% Quieter Level 2: 40% Quieter Level 3: 60% Quieter Level 4 80% Quieter Level 5 Silent
As a C4 expert, I only agree with the timer. That way I can synchronize multiple C4s (same detonation time), without having to set long fuse. 30 seconds minimum is good enough. Lower time will risk people using C4 as a grenade or Jihad bomb (like planting a C4 in a smoke for 10 seconds then run away).
I would have to say "no" to the C4 range. There are enough T-buddies getting killed by C4 from not noticing it as it is. How would you know to have to be 800 units or 1200 units?