Whole figure: Crazylegs
OK, I admit, this isn't an original custom made by yours truly.
I got this completely done customized figure from a lot of gijoe figures that I won from ebay some time ago, (so it's mine now ) and it stuck me as a really nice custom, even if the original owner just used a black marker for colors.
The head is actually a Crazylegs head, with face features sanded out. Though it looked like a Viper head afterwards.
So I just made some final touches, and gave it some accessories.