The Excalibur S5 String Shock and Sound Suppression System 1966 is an essential accessory for reducing noise and vibration in your crossbow. This system attaches easily to the riser of all 2004 or newer Excalibur crossbows, working in conjunction with the dissipator bar system to quiet shot noise and reduce vibration. Made from durable materials, the S5 system ensures long-lasting performance, making it an excellent upgrade for hunters seeking a quieter and more comfortable shooting experience. Excalibur S5 String Shock and Sound Suppression System 1966