Suggested by Sonic Metroplex is always known as one of the most powerful Autobots. The guy’s got a good amount of size on his side after all and a crazy amount of firepower. Sixshot is also known to be very strong because of all his modes though so he won’t go down easy. In this case I don’t think the size will hold Metroplex down too much or make him much slower than the average bot so he should be able to take this with his improved firepower. At his size, any big hit could be fatal to Sixshot. Metroplex wins.