Does anyone use the Parker Suppressors?

No but I made my own for all three bows, including my Cyclone. Doesn't do much for reducing noise, although is does reduce vibration, mainly built them to protect the bow in case of a partial dryfire.

Picture was taken prior to painting.

I use them on a 2009 Tornado...easy to install...really cut down on the vibration...not much (if any) difference in the noise, though...well worth the 60.00