The Lup.X is a small metal two-piece button that is now available in  5.5 grams and 8.4 grams.  Simply unscrew the suppressor, fit it around the string and screw back together.  The string fits in the channel so the suppressor stay where you put it.   You may wish to compare a Lup.X along with other wolf suppressors we can send on evaluation.  Results vary.