I had a DZ and noise was one of three problems I had with it. Didn't think I should have to do something else to it to make it quiet. Should come that way for over $100 IMO. I sold it and got a cheap GWS drop away that worked like a charm. I've come to the conclusion that drop aways are fantastic, as it really improved my accuracy, however - the simpler the better. The next one I buy will be a GKF TKO, Copper John Scardy cat, DMI Expert or Universal, or similar simple design.