In one of their tech tips videos, Fox Airsoft explains how Hopup buckings work, giving you a clear and concise understanding... "One of the first upgrades you can tackle yourself or have done is to change your bucking. Buckings are a wear item and can affect performance and function greatly when they go back. Upgrading to a nicer bucking can also be more worthwhile because they will last longer and be more consistent. But what does the bucking actually affect?"