Sure. You have two lines coming in on the top. One gas and the other beer. You insert the filler into the bottle and open the gas line to pressurize the bottle which will prevent foaming. You then open the relief valve on the side to purge the oxygen from the bottle. Next you shut off the...
It's a lot simpler. The counter pressure is slick, but takes some getting used to. The only down side to the beer gun is the price. You'll be out $100+ after you buy the gun and the required accessory kit.