The battle between the MG31 or the IR2115QTIMAX has been waged here many times before. Search the threads for 3/8 impact or each gun separately. It will come down to your personal preference as to which one feels better in your hand, has the power you like, is too noisey, the color red, etc. I had both and sold the MG31. I really like the balance, power, and feel of the IR titanium impacts but, that's just me. I would see if you could test drive each gun before making your decision. Real impacts aren't red.
