I just received a Gamo Whisper Fusion Pro in .177. Supposedly "89.5% more quiet." This thing isn't more quiet than jack....As loud as a .22lr. However.....great trigger and it is adjustable, accurate, nice 3x9 scope with front adjustable objective. So much for stealth. My Gamo Big Cat is more quiet. It is plenty accurate and the trigger smoothed out after about 400 shots.