This exciting accessory uses a combination of modern vibration reduction technology and common sense thinking to produce the most durable and effective shock and sound reduction possible. The “S5” string shock and sound suppression system attaches easily and quickly to mounting holes in the riser of 2004 to current none MATRIX or MICRO series crossbows and will work either in conjunction with Excalibur’s dissipator bar system or on its own to quiet shot noise and reduce vibration. Note: The S5’s will not work with our new MATRIX or MICRO Series Crossbows.