ORIGINAL: BGHUNTER00

I had the same problem and this is how I made my WB 100% silent. Cut a 2" piece of mole skin just wide enough to fit through the hole and attach both ends of the mole skin under the rest (metal part). This is covering the bristles and the arrow is then resting on top of the mole skin making it silent. Be sure that the arrow does not fit tightly in the hole once your mole skin is on. This has worked great for me.