12th Jun 2019 The Beeman QB78S is a great CO2 gun and so is The Umarex Fusion... so who will win in this head to head battle of the CO2 rifles? Watch and find out! Ben, The Outdoors Airgunner takes these two and runs them through the tests which include weight, accuracy, shot count and price. The Umarex Fusion is Ben's personal favorite but will the Beeman QB78S have better stats? This is going to be a great video for those of you who can't decide between the two or are looking for a great CO2 rifle. Its a great time to be an airgunner!