Excalibur Crossbow Sound Deadening System

crossbowexpert.com/product/ex...
The Excalibur Sound Deadening System is engineered to eliminate noise and shock throughout the string, limbs, and stirrup for deadly suppressed performance. The Sound Deadening System includes an over-moulded rubberized stirrup, Ex-Shox, String Stars, and RAVS silencers. This four-component package works in sync to dramatically reduce vibration and noise when the crossbow is fired, resulting in a much smoother shooting experience and effectively increasing your success in chasing game.
Works on all Excalibur hunting model crossbows.

[@kurtglo]

How does a person keep those suppressors stuck on? They fall off almost on everyone who puts them on