Hello all! This is Brian From BlackoutArmory.com I just got word from PolarStar regarding the new version 3 fusion engine drop in. If you do not know what they are for, it is a replacement for the gearbox such as ak and g36. The price is announced to be $500 for the engine and it will be released on December 10th. Luckily we have preordered 10 a few weeks before this announcement so we will be one of the first ones to stock up! What gun do you want to drop It in? Anyone own any fusion engines? What are your thoughts?!