Head - Tripwire
Arms, legs - Countdown
Torso, waist - Cobra Soldier (Black Major custom cast)

Submachine gun - Marauder Inc.

The first issue of Marvel's G.I. Joe comic I ever bought when I was younger is #36, "All the Ships at Sea!" In that issue, the Joe ship is attacked by two "Sea Rattlers", apparently Rattlers modified for operations at sea. There were also a couple of panels showing the pilots of these planes, who were clearly not Wild Weasel (especially considering both Sea Rattlers ultimately got blowed up real good). This custom is inspired by these pilots, who I'm calling Sea Snakes.

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