These bows were first brought into the market w/ the intent to be used for 3d. Thats why the whole bow is just about covered in rubber. Anti vibration. But the thing weighs a ton. I shot one and dont want one. We have a few shops in the arrea that cant move them. same ones been on the shlf for a few years now. They are more popular in the south. Seen a few at some tournaments.