My apologies to halfneck, I just cannot, for the life of me, find my torx set. Will try and stop at Lowes and buy a new one and get you an answer to your question.
OK, tried my Brownell's gunsmithing bit set and found that the Hex bit # H5225X fits the pivot on the Spitfire. According to Brownells this bit is an 1/8" allen. Nothing in my kit fits the clip screws.