Thanks, people.
The arms are from an Ice Viper. I like the shoulder armor, the gadget boxes on the upper arms and the forearm armor. If you look closely, there's amazing detail on the gloves as well. These arms are unusually well detailed.
I used the head from an Altitude/Red Star/Ripcord figure and repainted the dark blonde hair to reflect Skiratat's age.
I like the slightly bulkier look of the slip-on armor so I chose that over a Joe torso instead of using a Jango or Boba upper body.