Thank you....I did a test with C4 and at first with the Gobi it wouldn't work but I'm a terrible shot so I kept going and it works. No detonator needed. I tested with detonator and without and the explosion seems to be comparable. I've only ever found C4 with a detonator so it's good to know I can use it without one.
First time I used C4 was against the legendary cazador, it jumped me and I was like "crap get the most powerful stuff out!!". C4, excellente. *runs back, drops C4*
*legendary cazadore flies over C4*
*cries like a little girl*
But yeah, you need either a detonator or if you don't have one (some places they have C4 lying around but no detonator) try putting an explosive mine next to it, frag'll do.