Head: Tunnel Rat V. 4
Torso: Cross Hair
Arms: Tunnel Rat V. 4
Waist: Zartan V.4
Upper Legs: Zartan V.4
Lower Legs: Tunnel Rat V. 4

Guns: ?
Backpack: ?
Helmet: Xtreme Detail Soldiers...i think

Yet another Tunnel Rat, gee thanks Hasbro for your great one. Well, I really like the way Tunnel Rat looked in the G.I. Joe battle files by Image/Devil's Due (seen below).I also gave him a more dark and dirty look, he does go down in to tunnels.
A little to dark to see him, but isn't that the point?