@NerderDame I believe this is what it is. Check the accessories for this figure. They have it pictured in two parts: https://www.yojoe.com/action/04/overkill5.shtml Yours seems to be a little lighter, which could be the pic or my monitor, so I'm not sure if the accessory was reused elsewhere. And, I'm guessing it was in this animation going by plot summary and it being a Valor vs Venom accessory:https://en.wikipedia.org/wiki/G.I._Joe:_Valor_vs._Venom Anyway, I hope that helps.
Last edited by Alchemist; 01-12-2020 at 12:20 PM.