Body & Head: Gung Ho
Vest: Clutch
Machete: Robo Joe
Shot Gun: Marauder John

Muskrat was one of the last figures I got as a kid. But I always found him to be a great character and worthy of a 25th anniversary rendition.
My first attempt of this figure did not come out to great. The skin tones did not match and the green was too dark. So once I got another Gung ho it occurred to me that Gung ho was also a swamp dweller and with a few tweaks and some paint might be a good Muskrat.