The flow control of the extruder gun is a feature that allows the user to precisely adjust the speed and amount of material, such as putty or glue, that is extruded from the cartridge. In practice, this is most often a rotary dial or set screw located on the body of the gun. Its rotation mechanically limits the travel of the piston, which pushes on the bottom of the cartridge when the trigger is pulled. This control makes it easy to adjust the material flow to the specific job. For thin and precise joints, for example when caulking around a sink, you set a small flow rate, which prevents the application of an unnecessarily thick layer and makes it easier to create a clean line. Conversely, for filling larger gaps or working with denser materials, you can increase the flow rate. For guns without this feature, the amount of putty you can squeeze out depends only on the sensitivity and force of the trigger. Flow control therefore provides greater control over the application and helps to achieve a consistent result.