Legs & Head: Cobra Trooper V6
Body & Snow shoes: Snake-eyes V35
The Extreme Conditions: Arctic Assault Squad had great artic vipers, Scrap Iron was good, and the Snow Serpents were OK, but what about standard Artic Troopers.
I first saw a custom like this on Guru-Planet for sale. It was very easy to figure out what parts to make this custom with. I just did a head and leg swap, dyed Snake-Eyes backpack, add a rocket launcher, from Star Wars - Oddball, to give him a unique weapon and you have a Cobra Arctic Trooper.
Please bear in mind, most of my customs are LBC. I don't paint very well, so I pick parts that go good together with little or no paint.