What is a string silencer not commonly used with?

A string silencer is a device used to reduce the noise created by the bowstring when the bow is fired. It is particularly effective on bows that produce a significant amount of vibration and noise upon release.

Recurve bows and compound bows often utilize string silencers due to their unique string configurations and the type of power they generate, making them more prone to vibration and noise. Crossbows, while they can produce noise, typically have a different mechanism that diminishes string noise at the release point because their design is more enclosed and stationary.

Long bows, on the other hand, are generally made with a simple design and often do not create as much noise or vibration as the other types of bows when fired. The traditional style of long bows tends not to focus on the addition of modern accessories like string silencers. Therefore, string silencers are not commonly associated with long bows as they are with other bow types, making this the correct answer.