A suppressor, also known as a silencer, is a device that attaches to the barrel of a gun to reduce the noise and muzzle blast it makes when fired.
It does this by trapping some of the expanding gasses created when the gunpowder in the cartridge is ignited. These gasses are then slowly released from the suppressor, which reduces the noise level.
A suppressor also helps keep the barrel of the gun cooler, which in turn reduces wear and tear on the weapon. This is especially important for guns that are used repeatedly, like those used in shooting competitions or by law enforcement officers. Finally, using a suppressor can help you stay hidden while shooting because it decreases muzzle flash and makes it difficult to determine where the shots are coming from.